Looking like a third-rate salary man, the slightly dumpy Michio (Dankan) has reached his mid-thirties without ever joining the mob, confessing fear about life as a yakuza. Yoichi (Osawa Takao), the wild country boy from Shikoku he recruits, fits in better with that violence-prone world. But he is both too unruly to accept rigid gang hierarchies and too uncontrollable to go straight.
The two run an illegal bookie joint on behalf of the gangster Otani (Ishibashi Ryo). But far from accepting the rules of the gang, Yoichi steals Yoko (Kataoka Reiko) away from Otani's lieutenant Masao (Terashima Susumu). And against his own better judgement, Michio gets Otani's woman Miya (Aoyama Chikako) pregnant. The film speeds towards a violent conclusion when Otani is assassinated by a junkie and Michio, his pride hurt and hoping for a better life, absconds with Miya and the gang's money.