Detective Kamitsu investigates a baffling locked-room murder of a wealthy businessman. A mysterious "Woman in Black" disappears from a sealed room, and a stolen diamond escalates the crime—leading to multiple related murders and hidden connections.
| Actor | Role |
|---|---|
 Ainosuke KataokaKyosuke Kamitsu | Kyosuke Kamitsu |
 Maki MizunoNot listed | Not listed |
 Takashi FujiiNot listed | Not listed |
 Takashi UkajiNot listed | Not listed |
| HHirotaro SatomiNot listed | Not listed |