Story
Handsome young Katsuta tries to follow the yakuza code, but even his boss doesn't believe in it. Diamond Fuyu is less ethical, and allows the idiotic Tetsu to trick a schoolgirl he fancies, Hanako, into a type of bonded prostitution. Because of gang conflict, the Izu family (to whom Katsuta belongs) has their last gambling den taken over, and he seeks revenge. This brings him back into contact with a former lover who is also a card trickster - she is also Diamond Fuyu's sister, and is now married to Okaru-Hachi, who has mastered a clever card cheating trick called Okaru, which involves the deft use of mirrors.
Story
A conflict between two yakuza families in Tokyo, the Izus and the Yoshidas, has recently broken out. When an Izu underling starts a fight with a Yoshida man, Fuyu, the Izu family sends Tsuruta, a senior member of the clan, to make a personal apology to Fuyu. Tsuruta discovers that the woman he is in love with is Fuyu's sister, Tatsuko. Tsuruta ends up gambling with a swindler, who is in fact Tatsuko's husband. (The general plot of the film was re-used for Seijun Suzuki's Kanto Wanderer).