Baseball player Takatsuka is murdered mid-game in front of a large crowd. The autopsy reveals that he has been killed by a needle coated with a poison used by the Ainu tribe for hunting. The next morning, sports photographer Kawase is killed in the same manner. Kawase’s sister, Yuko, hires Taro Banai, the detective with seven faces, to uncover the truth.
| Actor | Role |
|---|---|
 Akira KobayashiBannai Tarao | Bannai Tarao |
 Aki YashiroNot listed | Not listed |
 Yoko NatsukiMasako Niimura | Masako Niimura |
| TToshio EgiNot listed | Not listed |
 Ann LewisSinger | Singer |
 Toshiaki MinamiNot listed | Not listed |
 Midori TakeiNot listed | Not listed |
 Atsuko KawaguchiNot listed | Not listed |
| CChiemi SekiNot listed | Not listed |
 Nami MisakiNot listed | Not listed |
 Tōru AbeKoizumi | Koizumi |
 Torahiko HamadaNot listed | Not listed |
 Hirohisa NakataNot listed | Not listed |
 Kyōichi SatōNot listed | Not listed |
 Isao KuraishiDetective Yamamoto | Detective Yamamoto |
 Masashi IshibashiNot listed | Not listed |
 Mikio NaritaGoro Seo | Goro Seo |
 Bin AmatsuHachiro Mochizuki | Hachiro Mochizuki |
 Ichirō ZaitsuDetective Udagawa | Detective Udagawa |
 Ryō IkebeNobuyuki Kinomata | Nobuyuki Kinomata |