Tokiko is an office typist who is more pleased at catching the owner's son attention than he knows. That's because her real boyfriend is Joji, a washed up boxer turned gangster and her employer is a great opportunity to milk him for them both. However, when Kazuko, the innocent sister of Hiroshi, a hopeful new member of the gang, comes to Joji to plead with him to send Hiroshi away, the gangster is warmly affected by her. However, Tokiko is jealous and determined to win Joji back no matter what the cost while Joji has his own decisions to make about his life.