Based on Matsumoto Seicho's classic mystery novel of the same name, the story centers around a group of detectives who are determined to find the truth behind an apparent double suicide.

• Toei Company
• Hiroshi Minami
• Isao Yamagata
• Mieko Takamine
• Yoshi Katō
• Takashi Shimura
• Ushio Akashi
• Tokue Hanazawa
• Yūji Hori