A boxing manager discovers that one of the boxers who have been promoted in love with a protected model and his mistress. Mad with jealousy, organized a match between it and another fighter who are friends with each other. Revenge in this case will be bitter.

As soon as he is released from prison, Maki goes to look for his friend Popeye. Together they rescue the grandfather from a dangerous form of "Russian roulette" played in the asylum, and decide to take a vacation at the beach.