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 and crewmate Usopp try hard to find a way to repair the Merry Go, but after Usopp is attacked and the money they had saved to repair the ship is stolen, Luffy must make the most difficult decision as a captain yet. What will become of their beloved ship? And where did Robin disappear to...?