The anonymous partnership Investment Economic Association, led by its president Ryuichi Amano, collected money from many ordinary people and paid out large dividends, making it famous as "Japan's only investment bank for ordinary people." On the other hand, Detective Muneharu Matsumoto of the Metropolitan Police Department's Second Investigative Division has suspicions about this organization, and has been spying on the business association for many years. However, Matsumoto was having a hard time getting any solid proof of the nature of the incident...
| Actor | Role |
|---|---|
 Keiji SadaNot listed | Not listed |
 Seiji MiyaguchiNot listed | Not listed |
 Taiji TonoyamaNot listed | Not listed |
 Kōji MitsuiNot listed | Not listed |
 Masao OdaNot listed | Not listed |
 Yūnosuke ItōNot listed | Not listed |
 Mutsuko SakuraNot listed | Not listed |
| JJunko ShiroyamaNot listed | Not listed |
 Kumeko UrabeNot listed | Not listed |
 Keijirō MorozumiNot listed | Not listed |
 Murasaki FujimaNot listed | Not listed |
| TTamotsu TamuraNot listed | Not listed |
 Eijirō YanagiNot listed | Not listed |
 Takamaru SasakiNot listed | Not listed |
| RRyuji KitaNot listed | Not listed |
 Zeko NakamuraNot listed | Not listed |
| SShojiro OgasawaraNot listed | Not listed |
 Rō OseNot listed | Not listed |