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 has made it to the tower where Robin is being held captive, but in order to save her, he must first get past the deadly assassin Rob Lucci. The rest of the Straw Hats are busy fighting their own battles to find the key that will free Robin. Can the crew find the right key in time?!