Follow the beginning of Luffy's search for the greatest treasure in the world: one guy alone in a rowboat, in search of the legendary One piece.

Luffy and pals are headed for the fabled Rainbase, the city of dreams. There they accidentally attract the unwanted attention of the Baroque Works security as well as their old "pal" Captain Smoker! While beating a hasty retreat from both, Ms. All Sunday invites the crew to the casino's VIP room, which turns out to be a trap. To make matters worse, Vivi gets separated from the others and is pursued by the Baroque Works! Will she be able to shake her...

The Straw Hat Pirates have agreed to protect a very importatnt person in return for untold riches.

If he's going to escape doing kitchen duty for a year aboard the Baratie, Luffy will have to get rid of Don Krieg. Unfortunately, Kreig's heavily armed and aided by his Demon Man commander Gin. As the battle commences, Nami has sailed off with the treasure in tow.

Arriving on a new island, Luffy and Zoro meet Nami, a girl thief who specializes in robbing pirates. With his royal henchmen, Mohji the Animal Tamer and Kabaji the Sword Swallower, fiendish pirate Buggy the Clown terrorizes a town, blasts buildings (and people) to pieces, and triggers Luffy's desire for revenge.

The Straw Hats at long last reach Alabasta! But their stay is cut short when Luffy attracts too much attention from the Navy. They're not the only ones interested in Luffy--someone from his past has been waiting for him too! Meanwhile, the Baroque Works' agents are summoned together when their leader, the dastardly Mr. Zero, aka Sir Crocodile, learns that Luffy is still alive and orders his immediate extermination!

Dorry the Giant launches an attack on Luffy and crew, assuming they are the ones who gave him exploding ale. He's defeated by the rubbery power of the Gum Gum Rocket, but there's still one question: Luffy didn't do it, so who slipped Dorry the ale?

The Straw Hats are keeping the Officer Agents preoccupied while Vivi makes her way to the palace. Sanji's got his hands full with Mr. 2 Bon Clay while Zolo battles mano a mano with Mr. 1--or rather sword to sword body in this case! That leaves Nami on her own with Ms. Doublefinger--a prickly predicament with only her wits and Usopp's special weapon to depend on. Can the Straw Hats prevail against the best of the Baroque Works?!