After being used and betrayed by the detective she had fallen in love with, young Matsu is sent to a female prison full of sadistic guards and disobedient prisoners.

Sabu and his pals hold a pauper's funeral for Sabu's mother. His brother Jiro arrives home, fresh out of jail, and Sabu pointedly states that Jiro is not invited. Jiro meanwhile is planning a big job - steal 40 million in cash and drugs, and he invites Sabu and gang to act as decoys, for 50,000 each. The sting is a success, but the double-crossing starts almost immediately. Sabu discovers how little of the take they were promised and hides the stash. Jiro and his slimy partner pressure the kids to fess up. Meanwhile, their respectable elder brother Ichiro is being leaned on by the town's big boss, whose money it was.

G-men challenge a jewelry smuggling ring. The chase starts in Kyushu and continues to Kobe to Yokohama.