Detectives of the First Investigation Division are investigating the murder of a 15-year-old girl, whose strangled corpse was found in the bay of the Tama River. The ugly behavior of adults hidden in the name of social welfare is exposed by the investigation. 16th work from the popular series "Keishicho Monogatari".

Drifting detective Goro Saionji is asked to investigate the sinking of a fishing boat in a port town on the Bōsō Peninsula and runs up against the smuggling gang behind the case.

Journalist Kuroki is investigating clandestine arms sales to Southeast Asia. He discovers that the point man in an arms trade was also involved in the cover-up of a murder on an American base during the Allied Occupation. The film rolls along as a suspenseful thriller while offering a critique of political corruption, hypocrisy, and journalistic cowardice in postwar Japan.

Ninth and final film in the Boy Detectives Club series. Features Tatsuo Umemiya's film debut.

Shinichi “Sonny” Chiba returns as the reckless son of a private detective takes on the case of a minor league baseball pitcher who disappears right before signing a contract into the major leagues. Meanwhile, the body of an orthopedist is discovered in the river.

The tyrannical Lord Danjo Mikoshiba covets the rich, fertile lands surrounding Lake Yakumo. During a memorial ceremony for the late Chigusa lord, Mikoshiba launches an attack, overthrowing the honorable Lord Juro. Just when all seems lost, Daimajin rises from Lake Yakumo to settle a score of his own.

After Japan's defeat in the war, the Anjo family lose their peerage and wealth. Since their mansion is due to pass into the hands of a creditor, the family holds one last ball before leaving.