Chopper joins the Straw Hat crew as they continue their journey to Vivi's homeland.
After finally been convinced to join the team, Chopper announces his intentions to Dr. Kureha, who doesn't take it too well; but after escaping from the castle, she has decided to give the whole Straw Hat crew a farewell gift.
After trying every trick in the castle, Wapol is finally hunted down by Luffy. The villagers along with Zoro, Vivi and Usopp start their ascent to the castle through a ropeway.
Chopper demonstrates the abilities of Rumble Balls when fighting Chessmarimo. Dalton is uncovered from the avalanche.
Wapol is determined to bring down Hiruluk's flag, and to do that, he engages Sanji, Luffy and Chopper in a fight.
More of Chopper's past is revealed, including the fate of doctor Hiruluk and Wapol's cruelties as the king. Meanwhile, Wapol reaches the castle where the crew is residing.
Doctorine continues to tell how Chopper lived his life and how the quack doctor Hiruluk took care of him.
Nami asks Chopper to join the crew, but he isn't interested. Kureha tells Nami some of what was Chopper's background. After realizing the abilities that Chopper has, Luffy is eager to make him join the crew.
The Lapahn help Luffy escape from Wapol, giving him enough time to climb to the castle where doctor Kureha lives. Vivi, Usopp and Zoro deal with the king's army in order to save Dalton. The recovering Nami meets a strange creature.
Dalton faces Wapol, but only gets himself hit by arrows thrown by his former comrade Chess. An avalanche stops the battle, but injures Sanji. Luffy must carry both Nami and Sanji to the doctor, and begins his ascent.
While Sanji and Luffy fight off the wilderness, the islander's worst nightmare turns true, as Wapol returns to the island. The doctor is discovered to be on the other side of the island, and Usopp, Vivi and Dalton rush to find her. Dalton however returns as he hears of Wapol's return.
The Straw Hat crew manages to gain the trust of the people that attacked them, and are taken to the village, except for Zoro and Carue, who guard the ship. Luffy and Sanji must take Nami to the island's sole doctor who lives on a mountain-top. Vivi and Usopp discover the past of the island, and about the pirate Wapol from Dalton.
While looking for a doctor, the crew meets the pirate Wapol. Meanwhile Smoker manages to intercept the conversation between Mr. 0 and Sanji and plans to go to Alabasta.
Nami is sick, but the crew doesn't have a doctor to help her.
Sanji, pretending to be Mr. 3, convinces Mr. 0 that he has eliminated Vivi and the Straw Hat Pirates. Dorry and Broggy see the Straw Hat Pirates off, and, to thank them, sacrifice their worn out weapons to kill a giant goldfish as it attempts to feed on the Going Merry.
While Mr. 3, in a in a waxen battle suit, fights Luffy, Usopp and Karoo attempt to bring down the wax pedestal. Meanwhile, Sanji stumbles upon Mr. 3's hideout, where he receives a call from Mr. 0.
While Usopp and Karoo try to out run Mr. 5 and Miss Valentine, Luffy tries to destroy the wax pedestal threatening the lives of his friends.
Mr. 3 creates a large, cake-shaped pedestal to turn Vivi, Nami, and Zoro into wax figures. Karoo, Luffy, and Usopp arrive at the scene just as Zoro attempts to free himself by cutting off his legs.
Mr. 3 captures Nami and Zoro while Mr. 5 and Ms. Valentine go after Vivi and Usopp.
Usopp, who is immensely impressed with the giants' fight, decides to strive to be like them and starts calling Broggy his master.
Nami and Usopp meet Broggy, the strongest warrior of Elbaf. Elsewhere, Luffy and Vivi meet Dorry, also the strongest warrior of Elbaf and engaged in a one hundred year long duel with Broggy.
As the Straw Hat Pirates sail toward Little Garden, the Baroque Works agents Mr. 3 and his partner Miss Golden Week receive new orders.
