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 the battle of Onigashima heats up, Kaido's daughter Yamato actually wants to join Luffy's side. Meanwhile, Kaido reveals his grand plans and, together with Big Mom, prepares to plunge the entire world into fear!