The film tells the story of a man who was washed ashore on an uninhabited island after a ship wrecked by a storm, and after twelve years, he returned to human society.

By all indications, an anti-government conspiracy is brewing in the Satsuma Domain. Already seven oniwaban spies sent by the shogunate have infiltrated Satsuma in order to scout everything on the spot. However, they had all disappeared, and it was unclear whether they were alive or dead. Kenzaburo Kamiya and Iori Matsumura successfully infiltrate as the eighth and ninth spies and witness law-breaking exercises using a cannon. However, soon Satsuma men found them and drove them to the cliff...

A Jonan Station detective, Kikuchi, is framed for smuggling drugs and sent to prison. When he is paroled, he joins a private detective agency, where he is asked to investigate Mitsue Takazawa, the wife of a local trading firm president. While secretly conducting his own research, he finds out that Takazawa's husband is the one, responsible for Kikuchi's imprisonment, who also have set sights on Setsuko, a woman Kikuchi becomes romantically involved with.

During WWII, Zensaku, middle-aged and deaf in one ear, learns that his son has fallen for the daughter of a war officer responsible for the maiming.