1965 Nikkatsu youth film.

Sawaki is released from prison after serving eight years for murdering a rival gang leader in order to obtain the land rights to a landfill for the Kotaki clan and he discovers that the world has changed significantly in that time. The police have forced the disbanding of all yakuza groups in and around Tokyo and most of the former yakuza have moved on to legitimate jobs. Sawaki is disgusted that his yakuza brothers have abandoned their codes of honor and are abusing their newfound power in the legitimate business world to exploit the poor. Sawaki feels partly responsible for making them so powerful and enabling their corruption, so he decides to follow his traditional code of honor to save the residents of a small town where his former lover lives.

The Maccherone organization is out to get a priceless national treasure. But when they see third-generation cat-burglar Lupin as an obstacle, countless assassins are sent to kill him on sight and kidnap his girl Fujiko! Can Lupin get the loot before the Maccherone gang, rescue Fujiko, and stay alive at the same time?

Nishimura Gosaku, an aspiring photographer who loves mountain scenery, meets a boy named Sada Ichiro one evening who asks to borrow train fare. For some reason, Ichiro follows Nishimura everywhere. When told to go home, Ichiro refuses, claiming he doesn't want to return because of his estranged parents. Reluctantly, Nishimura lets Ichiro stay the night. The next day, Nishimura takes photos of Ichiro by the Sumida River, and they part ways on good terms. Meanwhile, Ichiro's worried father, Shigeo and mother, Fujiko, desperately ask Ichiro's classmates and tutoring teachers for his whereabouts, but no one knows where he is. Suddenly, Shigeo receives a phone call demanding a ransom of 10 million yen.