One weeks after the events of Regular Life as a Teenage Child movie 5: a Ninja and Samurai's Legacy and evil's amnesia, kai wake up in the hospital and find Going merry and the locket of his lover, angela was stolen by thieves. They chase after it along with straw hat crews and encounter the Thief Brothers, who plan on stealing the Diamond Clock from Clockwork Island becoming the worlds greatest thieves. They then encounter the Trump Siblings, a group of dangerous pirates with their captain, Bear King, who intends on becoming Pirate King. After Nami and robin are kidnapped, the Straw Hats journey to Clockwork Island and challenge the Trump Siblings to a great battle in Trump Castle and encounter the mist, A deadly storm unleashes a species of sins bloodthirsty spirit called trump pirates on a small town island, where straw hat crew and a small band of citizens hole up in a clockwork island and fight for their lives.
The prologue begin with one weeks later... The morning after the events of Regular Life as a Teenage Child movie 5: a Ninja and Samurai's Legacy and evil's amnesia a violent thunderstorm, kai wake up in hospital to check the damage. He find a locket planted by his lover has fallen on the room and tree belonging to the female patient named sally wilson has demolished their boat-room and landing pier. Kai goes to ask the doctor for his insurance details to pay for the damage to the boat-room. As he is leaving the hospital, he notice a strange mist floating across the surface of the lake towards their property.
Kai decides to go to the beach to meet luffy and his crew, bringing sally wilson along.On the way, they see a convoy of military car. When they arrive at the meeting party, they find it crowded with people who are also recovering from the storm. As the town's tornado sirens go off, a panicked finn and friends with a bloody injures, runs into the store warning of something dangerous in the oncoming mist.Shortly after, the mist envelops the party house, making it impossible to see outside, and a violent, earthquake-like tremor hits.
turbo/king candy a religious fanatic, believes that this is the beginning of Armageddon. manolo and Joaquín, against objections from the others, leaves the beach to get hometown to maria, who they left at home alone.
Kai and others investigate the loading bay generator and find that the exhaust door is plugged Lumpy from happy tree friends volunteers to go outside and unplug the vent, but as he steps outside, he is snatched and devoured by an unseen monster, despite the efforts of Kai and assistant doctor's patient sally to save him.
Upon returning to the main house, Manolo doesn't believe their claims and is certain that Kai is playing a joke on him and the other friends are backing him up, as pay-back for the lawsuit Norton filed against Kai last year. Later, he and sally are sleep on floor.
Two days later the Straw Hats on the beach. Luffy, chopper and kai sits on a large rock by the ocean, luffy winding up a windmill toy, while Zoro does pushups with large bags on his back. Nami and robin lies sunbathing as Sanji,franky and brook comes up to them, undoing their bikini top and massaging their back. Usopp runs up and sits down in the sand as Luffy,kai and chopper looks at the Going Merry, noting how cool it is. Usopp notices that the Going Merry is starting to sail away, and Zoro and Usopp freak out. Luffy tries to stretch out his arm to reach it but stops short of reaching the bow before his arm retracts. The crew are then left on the beach yelling at the thief to give back their ship.
The movie film start with kai, sally and the Straw Hats are shown cramped on a small swan paddle boat to chase the thief wearing clothes for wedding ceremonies as their regular clothes were stolen with the Going Merry (except Luffy, who was wearing his regular outfit and kai, who was wearing bandage on his body and wearig his pant, bringing his bag). They come across a boy struggling in the water, and Sanji dives in to save him. However it ends up being a trick as kai,sally and all of the Straw Hats ends up getting captured by a net, lifted up and out of the water. They are brought down on the deck of another ship, where a man in a pilot's uniform stands. He introduces himself as Borodo as the boy introduces himself as Akisu, and they are the Thief Brothers. They declare they will become the greatest thieves in the world and steal the Diamond Clock from Clockwork Island, which Nami explains is one of the greatest artifacts in the world.
Luffy and kai asks Borodo about the Going Merry, which he replies was taken by the Trump Siblings. He shows the wanted posters of Boo Jack, Honey Queen, Skunk One, Pin Joker, and Bear King to them. They then find a fleet of ships coming toward them, the fleet of the Trump Siblings. In the crow's nest of one of the ships is Honey Queen completely naked taking a bath. Boo Jack then jumps out and declares that their captain, Bear King, will become the Pirate King. Boo Jack and Honey Queen order an attack, so the pirates of the Trump Siblings start leaping down to attack the Straw Hats. The Straw Hats manage to fight them off, but Boo Jack himself leaps down, curling up and becoming a big spiky white ball.
Luffy places his hat on Nami's head and kai turned into destined character then places his watches on robin's hand as they gets ready to fight. Usopp and brook declares their plan, "Running is Winning", and has their boat flee from the Trump Siblings' fleet. In the chaos, the Thief Brothers lose a small box, so Borodo leaps into the water after it as Akisu whacks Usopp and brook in the head to stop him. Borodo retrieves the small box, but Honey Queen arrives, standing on the back of Boo Jack in the water, and Boo Jack hurls bombs at the boat, blowing it apart. Boo Jack and Honey Queen kidnap Nami and robin, as she is a great thief, and throw another bomb to make their getaway. kai sinks below the ocean's surface, but Sanji manages to retrieve him.
The remaining Kai,sally and Straw Hats huddle aboard the wreckage with the Thief Brothers, with Borodo deploying a parachute as a makeshift sail. Sanji blames Borodo's going after the music box for the reason Nami and robin was kidnapped, but Borodo explains that it is the only thing Akisu has left of their hometown. A brief flashback shows how when Borodo found Akisu, the lullaby of the music box was all that could calm him down. Luffy asks if that means they are not brothers, but Borodo replies that they are brothers even if not through blood. As they sail along, Usopp spots a whirlpool, and Borodo says that it means they are coming close to Clockwork Island. On Clockwork Island, in a great castle, Bear King sits on his throne while two scientists explain the situation to him. They say the weapon of mass destruction he is having them build has spilled too much blood, but Bear King does not care and orders them back to work, as he will need the weapon to conquer the seas and become Pirate King. Honey Queen and Boo Jack come into the room carrying Nami and robin, and Skunk One looks all over Nami and robin creepily. Bear King asks if Nami and robin will be his brides, and they glares at him, so Bear King says that she is his type. Nami amd robin tells Bear King that they cannot stand hairy men, so he offers to shave, but then says that they hates weak men more, doubting that Bear King could beat Luffy. Honey Queen and Boo Jack show Bear King the wanted poster of Luffy, and Pin Joker says that Zoro must be with him too. Bear King declares that he will kill Luffy and use his bounty to fund his wedding with Nami and robin.
In night time, kai is sleep, in the dream A brief flashback shows how when kai invited Angela's party. in Angela's house, kai and angela admire the party home in the Great castle and the clutch of lockets when a demon spirit like creature attacks called snakes-ghost, knocking Kai unconscious. He wakes up to find Angela and all but one of the lockets have disappeared which she been kidnapped by snakes-ghost. Kai Found this locket with picture as teenager, a memories that His lover liked. As the dream end, kai woke up
Meanwhile, kai,sally the remaining Straw Hats and the Thief Brothers arrive on Clockwork Island, and immediately start heading up the winding stairs to the town that is at the top. The way is laden with traps, though, and the stairs turn to a ramp as they start to slide down, water rushing toward them. Luffy grabs on and uses his Gomu Gomu powers to stop them from being skewered upon spikes, and as boulders come rolling toward them Sanji leaps from wall to wall, kicking them away. Zoro reaches down and tears up the floor so that they can walk up the path to the top. They arrive at Clockwork Town, a fun place with windmills everywhere, and a large tower, Trump Castle, is in the center. At the top of the tower Usopp can spot the Going Merry. The seven decide they will get new clothes and grab a bite to eat before rescuing Nami and robin, much to Borodo's, sally's and kai's shock.
Zoro, franky,brook, Usopp, and Sanji get new clothes that are much easier to move in, and the group heads into a sort of shop. Luffy and chopper says Clockwork Town is fun, but the two scientists at the shop disagree. They explain that they created the Diamond Clock, but ever since, they have been suffering since the Trump Siblings arrived. Ever since, they have been creating killing weapons instead. Borodo declares that the Straw Hats will defeat the Trump Siblings, but they object, as they have not agreed to anything yet. Usopp says Borodo just wants this because the Diamond Clock will be easier to steal without the Trump Siblings around. The scientists say it will probably be better if the Diamond Clock is taken away. Luffy and kai then says that you cannot make a fortune without risking your life, so they decide to set out. As the group leaves, the scientists find a music box on the ground, realizing that the boy was Akisu.
In Trump Castle, Nami and beats the Trump Siblings at poker. Honey Queen gets up and walks away, dropping off her clothes and turning into water as she slides into a pipe. Boo Jack decides to go too, wheeling off down a rope. Outside, sally,kai, Luffy, Zoro, Usopp, Sanji,franky,chopper,brook Borodo, and Akisu are hauled up in a small basket along a rope, high above Clockwork Town, toward Trump Castle. Luffy notes that the windmills below look just like his windmill, and he takes it out and finds it is broken. Akisu quickly fixes it. Suddenly, Honey Queen forms before them, and Boo Jack arrives as well, tossing her clothes to her.
Honey Queen declares she has eaten the Toro Toro no Mi, and so Boo Jack throws balls at them. Sanji leaps out to kick him away, but spikes protrude from Boo Jack's ball, piercing right through Sanji's foot. Sanji cries out in pain as he starts to fall. Borodo catches him only to drop him when Honey Queen floods their airship. Sanji then falls and hits the ground, hard. A mine then nearly blows Sanji up. He is then quickly tied up by Honey Queen and Boo Jack and brought to Trump Castle. Sanji is dumped before Bear King, robin and Nami, and Bear King says he did not kill Sanji because he is Nami's and robin's friend. Nami proceeds to deny caring for him anymore. Bear King then sends Skunk One to get rid of the rest of the crew.
Meanwhile, at the gate to Trump Castle, the group, minus Sanji, has arrived and Akisu goes on about how if he was captured, Borodo would save him no matter what, and the others see that Borodo has a metal hand. This irritates Usopp, who says that it does not matter at sea, and how he hates people who depend on others to save them. Luffy and kai then says it's time to get going, and he tells Akisu to stay behind if he's afraid. He uses Gomu Gomu no Pistol to knock down the door, and he charges in, but is quickly mobbed by a huge group of pirates. Zoro runs in after him to help. Meanwhile, back in Trump Castle, Pin Joker notes how Zoro finally arrived.
Suddenly several pirates, formerly under El Drago, arrive with the King Cannon, which is now completed. They dance, proclaiming about how much better Bear King is than El Drago. Sanji apologizes to Nami and robin about how he could not do anything because he wanted to use only his own strength to show off to the. Bear King interrupts, demanding what Sanji's relationship with his "fiances" is, and Sanji replies that he "rubbed suntan lotion on their smooth skin". This makes Bear King angry, and after beating Sanji up declares that he will have Sanji crucified.
Down below, kai, sally, Luffy and Zoro fight through the pirates when Skunk One arrives, standing on a tall pole. He points them toward Sanji, who is hanging from a cross up high outside the castle, and so he unleashes a cloud of gas, gas that will make those who inhale it paralyzed. As kai, sally Luffy, Zoro, and Borodo's strength start to fail, Usopp turns to Akisu, chopper, franky and brook, declaring how brave he can truly be. Usopp scales the pole and grabs Skunk One around the legs, holding the flap that releases the gas shut, yelling for the others to go on ahead. Skunk One becomes furious, trying to shake Usopp off, and Usopp has to put his mouth over the gas release to keep the gas from coming out. The others see Usopp's diversion and so they rush on ahead as Skunk One launches into the air with Usopp along. He lands on the balcony of Trump Castle, and Usopp collapses, filled with the poisonous gas. Bear King declares that Usopp will be crucified as well, and he is put up on a cross beside Sanji as Nami and robin looks on in despair.
Kai, sally, Luffy, chopper, franky, brook, Zoro, Borodo and Akisu rush up the stairs of the castle, fighting through the enemy pirates, but as they near the top they come to a chamber where the floor and ceiling close in on them. Kai, sally, chopper, franky, brook, Zoro and Luffy struggle to hold it up as Akisu is knocked out, and Borodo takes Akisu to safety. Borodo reveals that he was the one to steal the Going Merry, as he wanted to bring the Straw Hats to Clockwork Island. Zoro blames it on Borodo's greed for the Diamond Clock, but Borodo replies that he wanted the Trump Siblings defeated so the island could be free and Akisu could meet his family, as Clockwork Island is his home.
Borodo rushes ahead to face the Trump Siblings, leaving Kai, sally, chopper, franky, brook, Luffy and Zoro to their fate. Pin Joker then arrives, drawing his sword and saying how Zoro gave him the scar he has across his face. Zoro replies that he does not remember Pin Joker, so Pin Joker becomes angry, using Hari Hari Ken (Sword of Arrows) to stick Zoro full of needles. Zoro falls to one knee, as the needles were tipped with Skunk One's poison. Zoro tells kai,sally Luffy and other to hold on a little longer as he draws his sword and charges at Pin Joker, but a fence comes up in front of Pin Joker, causing Zoro to only slash it instead. Pin Joker jabs his sword through the fence, getting Zoro in the midsection, and so he carries away the injured Zoro on the lift, where he is brought to Bear King to be crucified.
At the top floor of the castle, Zoro, Sanji, and Usopp hang bound to crosses as Bear King readies to King Cannon to blow them all apart. He says that Nami must be overjoyed, but Nami aims a kick at Bear King, snapping how she'd rather die with her friends then marry him. Bear King strikes her across the face, saying it can be arranged, and so Nami is set up to be killed as well. Down below, Akisu wakes up to see Luffy struggling under the ceiling, asking where Borodo went. Luffy explains Borodo went to fight the Trump Siblings, so Akisu runs up the stairs after him, much to Luffy's dismay. Meanwhile, Bear King fires up the King Cannon, but before he can fire, a large metal wall comes up, with Borodo standing before it. He walks forward with dynamite strapped to his midsection, and holds a lighter, ready to sacrifice himself for the island. Bear King only laughs, stepping forward as he says that detonating the dynamite will only destroy the island's key, which is below his feet, within the castle. If the island key is destroyed, the whole island will be destroyed as well.
At the top floor of the castle, Zoro, Sanji, and Usopp hang bound to crosses as Bear King readies to King Cannon to blow them all apart. He says that Nami and robin must be overjoyed, but Nami and robin aims a kick at Bear King, snapping how they'd rather die with their friends then marry him. Bear King strikes their across the face, saying it can be arranged, and so Nami and robin are set up to be killed as well. Down below, Akisu wakes up to see Luffy, kai, sally, chopper, franky, brook struggling under the ceiling, asking where Borodo went. Kai explains Borodo went to fight the Trump Siblings, so Akisu runs up the stairs after him, much to Their dismay. Meanwhile, Bear King fires up the King Cannon, but before he can fire, a large metal wall comes up, with Borodo standing before it. He walks forward with dynamite strapped to his midsection, and holds a lighter, ready to sacrifice himself for the island. Bear King only laughs, stepping forward as he says that detonating the dynamite will only destroy the island's key, which is below his feet, within the castle. If the island key is destroyed, the whole island will be destroyed as well.
Before Borodo can react, Bear King starts tossing him around like a rag doll, knocking the dynamite off of him. Akisu tries in vain to help his brother. As Borodo hits the floor, Pin Joker picks him up angrily after Borodo corrects him on a misspoken word (Pin Joker misspeaks many times throughout the movie). Akisu then tries to defend Borodo. Meanwhile down below, Luffy sees that his windmill toy, which Akisu kept after fixing it, is broken, so with great fury he pushes up the ceiling, forcing himself, his crew, kai an sally up and through the floor of the throne room where the Trump Siblings are.
As everyone gapes in shock along with kai, sally and straw hats crew, Luffy picks up a stick of dynamite, notes how cool it is, and lights it. Everyone freaks out for Luffy to throw it away, so Luffy tosses it to the iron wall in front of his crew. It blows the iron wall to pieces, and Luffy asks where his friends are, which the Thief Brothers reply to that he just blew them up. However, Sanji, Zoro, and Usopp emerge from the smoke, albeit somewhat battered.
With the three now free, the Trump Siblings burst into action. Skunk One chases Usopp up to the roof of the castle, but franky, brook and chopper runs in after him to help. Sanji and Boo Jack square off, and Boo Jack laughs that Sanji will not be able to kick him with his bleeding feet. Usopp tosses down Sanji's shoes to him, and Sanji puts them on, but Boo Jack refuses to believe they will make a difference. Usopp shoots Skunk One in the face with a Sure Kill Egg Star, and as Skunk One goes down he tosses Zoro's swords down to him. Zoro catches them and barely blocks Pin Joker's sword, who took a stab at his back. Zoro stands in front of Nami and robin, defending her. Bear King and Luffy begin their fight, as Luffy uses Gomu Gomu no Gatling Gun, but finds it has no effect. Bear King declares that his body is as strong as steel because he ate the Kachi Kachi (rock hard) Fruit.
Boo Jack curls up into a ball and charges at Sanji, but Sanji sends him careening into the roof with one kick. Sanji leaps up and proceeds to kick Boo Jack, several more times until he drives Boo Jack down through the floor, into the island key chamber. He again drives Boo Jack into the ground, and Sanji stands victorious, flicking away his cigarette, as Boo Jack lies in a bloody heap. On the balcony, Zoro tears off his sleeves, assuming his three sword stance, and he charges at Pin Joker. Skunk One declares to Usopp the power of his poison gas, and he charges at him as Usopp, brook, franky and chopper pretends to be frightened. At the last second Usopp fires his Flaming Star, striking Skunk One and causing a big explosion. Usopp, brook, franky, chopper falls back into the pool below while Skunk One is sent flying off into oblivion. Floating in the water, Usopp yells that Skunk One got what was coming to him. Luffy uses Gomu Gomu no Whip on Bear King, but gets all tangled up and is knocked to the floor.
Zoro and Pin Joker trade sword swings, engaging in a fierce duel. Pin Joker uses Hari Hari Ken once more, but Zoro blows them back with his swords. He stands back up, and Pin Joker says how he shouldn't be able to stand with all of the poison in his body. Zoro replies that he cannot fall, because he faces a long journey and there is one man at the end of it for him to beat. Zoro then uses Oni Giri and takes Pin Joker down. Upon seeing the defeat that the other Trump Siblings endured, Honey Queen flees, dropping her clothes and becoming water again, heading into a pipe, but Sally,Nami and robin grabs the pipe and Sally pours Honey Queen into a jar, which she, nami and robin screws shut and holds down.
Meanwhile, the fight between Luffy and Bear King continues as Bear King's arm lights with fire. Luffy grabs onto it but is singed. Bear King starts pounding Luffy around, but Borodo fires a missile from the King Cannon at Bear King. Bear King is barely able to avoid it as it smashes through the window and flies out into the sky, landing in the water with a great explosion. Borodo says that his next shot will not miss.
Bear King becomes furious that Borodo is using his cannon, so he pulls a gun and fires it at him. Akisu leaps in the way and is shot in the chest, falling to the ground. Luffy becomes furious and throws Bear King through the wall, causing the entire top tower to tip and water to pour down. Bear King emerges, more furious than ever, and he climbs onto the King Cannon and fires it at Luffy. Luffy catches the missile with his foot, twisting himself around and stretching himself way out into the sky, and so he pulls it back in, using Gomu Gomu no Screw to drive the missile right into Bear King's chest. Bear King is driven through the floor and lands in the island key chamber, where there is a great explosion and the island key is destroyed.
Nami tosses Luffy's hat back to him as congratulations for defeating Bear King and robin puts watches to kai's hand. Borodo kneels beside Akisu and sees that Akisu's chest was protected by a sheet of metal under his shirt. As Borodo carries Akisu to safety, the Diamond Clock starts chiming. All of the Straw Hats and Borodo as well as Akisu recognize the sound as Akisu's music box. It is then revealed that the two scientists they had met earlier were Akisu's parents.
The two brothers head back down out of the castle to the townspeople of Clockwork Town, and meet the two scientists from before again. The scientists explain that Akisu is their son, and a brief flashback shows the mother putting Akisu into the water, hoping that he will escape and survive.
With the key destroyed, the entire island starts to collapse, and the Going Merry falls from it and into the ocean. The people of the island land in the water and scramble into the boats as their island is completely gone, but they know it could not be helped and that they will rebuild a new island and a new future. On board one of the ships, Akisu is reunited with his parents, the two scientists from before, and he hugs his mom. As the Straw Hats sail in the Going Merry alongside Borodo in his small ship, Borodo says that Akisu's parents are great people and that he's better off. Borodo says he is glad to be on his own, because the Trump Siblings' treasure is all his now. However, Akisu jumps back onto the boat, declaring that he will continue along with Borodo, and so the Thief Brothers are reunited, deciding to split the treasure between them. The Going Merry then sails over the horizon as luffy and his crew find kai, who gone after he jump into ocean to go island
At island, Kai sat on the top of a tree pondering over the loss of his lover, he tried to cheer himself up by drinking a cheer-up potion, but accidentally drank the sorrow potion instead. This caused him to weep uncontrollably, and made his body injure flesh fade to healed body and his voice permanently deep.
A few weeks later, darlyn and friends came and told him that sally was missing while looking for him. To find sally, Kai again called for the cheer-up potion but accidentally used speed-up potion, which caused him to move very quickly and uncontrollably.
At the snakesdemon's dungeon, angela wondered where Kai has gone. In the same area, the Trump Siblings, who survives from earlier in the movie appeared, being chased by Sins fighters Patrol. They control snakesdemon force itself to took angie hostage and threatened to hurt her if they are followed. Kai appeared on the scene and jammed the exhaust stomach of the snakesdemon' flesh with his head, causing the snakesdemon to crash and the Trump Siblings to be caught. Angela was saved but Kai lost his locket during the rescue. When his friends found angela and Kai, darlyn give him a locket.
Epilogue, kai and friends are sleeping during the night time, then wake up sees the trump siblings was turned into ashes after defeat by them as they sleep again.
In a mid-credits scene, kai and friends wake up to eat, but the darlyn's pet hamster, pinky is eating dead trump siblings's ashes before slowly turning into a possessed itself, causing Kai to scream in terror and horror as movie film end.