The second-generation president and his brother-in-law of the Toba clan, a don of the music world, are kidnapped. Singer Chiaki and pianist Yonosuke contact Chiaki's father, a detective, and police surround the island. The president's mother-in-law, who entered the island with the ransom money, is shot and injured, but the culprit who stole the money cannot be found. Chiaki begins to investigate the island on her own, and soon finds Kunihiko's body, a hunting rifle, and the ransom money in an island bomb shelter. This is a mystery that challenges the mystery of a bizarre kidnapping and murder involving the family of a prestigious president

Reportage writer Kenzo has made an interview appointment with Morishima, the mastermind behind the political and business world. On that day, Morishima is killed and a 200 million yen diamond is stolen. The diamond was brought by jeweler Kuhara to sell to Morishima. A woman named Maki who was present and disappeared immediately after the incident is suspicious. However, the site is a completely closed room. Kenzo's older brother, Matsushita, the chief of the investigation section, also shook his head...

1991 film by Yukihiro Sawada