The Ninja-Pirate-Mink-Samurai Alliance gather their forces in Wano Country and prepare for their inevitable clash against the Beasts Pirates. The history of Kozuki Oden and his ties to Wano Country, Whitebeard and Gol D. Roger are revealed, and the Alliance assaults Onigashima to take down the allied forces of Kaidou and Big Mom once and for all. The resulting battle, as well as the events during the recent Levely, cause the world to go through dramatic changes.