Kinemon and the other Akazayas want to cross to Onigashima by boat! However, they are stopped by Kaido's fleet on the way. The spy who revealed their plan finally reveals himself.

Kyoshiro has come with his clan for support. But to everyone's surprise, he does not attack the Straw Hats or the Akazayas, but targets Kaido's fleet instead. How will the course of the battle develop?