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...

As Luffy heads to the top of Onigashima for a direct confrontation with Kaido, the rest of the Straw Hats fight their own battles. The numbers aren't on their side, but perhaps some surprise allies will help even the odds!