Daigaku, member of the circus, is involved in a certain case and is suspected by Detective Hattori and others that he's the culprit. In order to unravel the truth, he does his own investigation with the cooperation of members of his circus troupe.
| Actor | Role |
|---|---|
 Sonny ChibaMaejima Daigaku | Maejima Daigaku |
 Hiroyuki SanadaSatomi Go | Satomi Go |
 Kazuko KatoNakahata Reiko | Nakahata Reiko |
 Tatsuo UmemiyaDetective Hattori | Detective Hattori |
 Michihiro YamanishiDetective Kuriyama | Detective Kuriyama |
 Junkichi OrimotoSogoro Nakahata | Sogoro Nakahata |
 Kenji OhbaAraki Yuzuru | Araki Yuzuru |
 Shunji SayamaAmamiya Hidejiro | Amamiya Hidejiro |
 Junichi Haruta[Circus member] | [Circus member] |