A wheelchair-bound daughter is told that her mother's death was a murder and asks for an investigation, gradually learning the secret of her own birth.
| Actor | Role |
|---|---|
 Yoshiko TanakaMitsuko Iga | Mitsuko Iga |
 Hirotaro HondaJoji, Mitsuko's husband | Joji, Mitsuko's husband |
 Shinobu YukiAkiko, a secretary | Akiko, a secretary |
 Yūko KatagiriMasano, the maid | Masano, the maid |
 Mikijiro HiraKotaro, Iga Kanko's president | Kotaro, Iga Kanko's president |
 Kyoko KamimuraKotaro's second wife | Kotaro's second wife |
 Tomo'o NagaiYukichi, Mitsuko's grandfather | Yukichi, Mitsuko's grandfather |
| SSanji KojimaRyutaro | Ryutaro |