As a child, Monkey D. Luffy dreamed of becoming King of the Pirates. But his life changed when he accidentally gained the power to stretch like rubber...at the cost of never being able to swim again! Years, later, Luffy sets off in search of the "One Piece," said to be the greatest treasure in the world...

Luffy's navigator, Nami, has been working all along for "Saw-Tooth" Arlong to steal enough treasure to buy back her village. In return, the pirate has handed over her fortune to the Navy! Now Luffy and his crew prepare to risk their lives for Nami's sake against their most ruthless opponent yet.