Shunsuke Godai

Samon, who had left his position as a police constable, embarks on a journey. During his travel, he is attacked by a group of masked bandits and sufferes a deep wound on his way back to Edo at the request of Magistrate Toyama. Saved by Dr. Kazumichi, Samon is asked by Toyama to identify an informant among the members of the lightning gang, a group of cruel thieves wreaking havoc throughout Edo. Samon then becomes an assistant to the firefighter squad led by Naito Hayato-masamune. One night, while rushing to the oil merchant Tambaya, who is attacked by the robbers, Samon and his group discovered a trembling young girl Oso who is the only survivor of the massacre and has lost her voice due to terror.

En Allemagne, dans le château de Wolfborg, l'empire de la Science sombre Desdark établit des plans de domination mondiale. Découvrant cela, le Docteur Hideki Hongô tombe entre leurs mains et est sauvé par le spéléologue Kenitchi Akama. De retour au Japon, le Docteur Hideki Hongô décide de former une équipe chargée de lutter contre l'empire de la Science sombre Desdark. Ce dernier apparait alors au Japon dans le but d'y instaurer sa loi avant de conquérir le reste du monde. Mais l'équipe formée par le Docteur Hideki Hongô se dresse contre eux. Le combat pour la liberté du monde ne fait que commencer…