Post World War II, Minoru lives by selling supplies that had been stolen from the U.S. military. One day, he is arrested due to the plotting of Kurahata, a member of the Yakuza who doesn't like him.

Set in Kyushu during the early Showa period, the son of a boss who is killed after a greedy boss takes over his territory, takes over and takes revenge on his nemesis.

Kogure, an industrial spy, is tasked by Sawada, head of the research department of the Nisshin Corporation, to learn the secrets of the design of a new engine invented by a rival company. Kogure manages to obtain the secrets, but Sawada's goal was not the secrets themselves, but to use them to obtain the position of president of the company. Angered by Sawada's dirty tricks, Kigure begins to take revenge.

Police detectives investigate the link between a serial killer's machinations and a teenage boy who committed suicide.