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.
| Directing | Tsuneo Kobayashi | Director |
| Writing | Seicho Matsumoto | Novel |
| Writing | Masato Ide | Writer |
| Production | Noboru Nezu | Producer |
| Editing | Fumio Soda | Editor |
| Art | Suguru Tanabe | Production Design |
| Camera | Shizuka Fujii | Director of Photography |
| Sound | Chūji Kinoshita | Original Music Composer |
| Directing | Masuichi Iizuka | Assistant Director |
