A little girl named Sayoko witnesses the murder of an Interpol agent by the G.O.D. kaijin Hercules. Keisuke Jin saves her before Hercules disposes of her. Sayoko tells Keisuke that G.O.D. is targeting an important official named Kibara. Kamen Rider X has his hands full when G.O.D abducts Kibara and takes Sayoko and her mother hostage.
| Actor | Role |
|---|---|
 Ryô HayamiKeisuke Jin / Kamen Rider X | Keisuke Jin / Kamen Rider X |
| NNaoko MiyamaRyoko Mizuki / Kiriko Mizuki | Ryoko Mizuki / Kiriko Mizuki |
 Osamu SakaGeneral of G.O.D. (voice) | General of G.O.D. (voice) |
 Shinji NakaeNarrator (voice) | Narrator (voice) |
 Ritsuo SawaHercules (voice) | Hercules (voice) |
 Akira HamadaHercules (human form) | Hercules (human form) |
| MMasako ShiratoriSayoko | Sayoko |