Tsuda Yoshiharu, a door-to-door insurance salesman, takes up boxing after a chance meeting with a former high school friend, Kojima Yakuji.

Tsuda is shown to be under immense stress due to having to support both himself and his fiancée, Hizuru, who quit her job after they became engaged.

Hizuru also wants to take up boxing but is denied that life by the surprisingly cowardly Kojima, who says she is a scary freak of a woman.

However, Tsuda abandoned this plan and suppressed the memories of the event, leaving only Kojima continuing down this path.

Tsuda's continued efforts to win Hizuru back, leading to a confrontation where they bond by beating each other's faces to a pulp.

Kojima wins the match, but he has been pushed past his limit and his face is shown to be unrecognizable because of injuries.

The final shot of the film is a zoom in on a punching bag hanging in an empty boxing gym while the cheers of a crowd are heard.