After the boxing champion retires, the head of a powerful gym, Minegishi (So Yamamura), recommends Yamanaka (Hiroshi Kawaguchi), who is no longer in top form and is ranked number one, for a title fight, but his comrade Hata (Kojiro Hongo) is not happy with this choice, and so he moves to the gym run by the criminal businessman Goda (Toru Abe) and burning desire to beat Yamanaka.
