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...

The secrets of Trafalgar Law's past are revealed as we flash back to thirteen years in the past. Just how did Law gain his devil fruit powers? Meanwhile, in the present, the battle for Dressrosa heats up as the Straw Hat pirates face off against the Doflamingo family!