The scene is Steam City, a London-ish city which represents an entire civilization run by coal and steam power. Because of steam, the city is sometimes covered in a mist. Villains take advantage of the steamy mist to hide and execute their evil plans. Only a few dare venture into what's beyond the steamy mist. They are known as the Steam Detectives: Narutaki (and his convertible all-purpose pistol), his nurse-assistant Lingling, and his Megamaton robot Gohliki.
Narutaki
Main
Souichirou Hoshi
日本語
Ling Ling Hsu
Main
Hiroko Taguchi
日本語
Onigawara
Supporting
Nobuo Tobita
日本語
Machine Baron
Supporting
Norio Wakamoto
日本語
Crimson Scorpion
Supporting
Chisa Yokoyama
日本語
Lang Lang Hsu
Supporting
Miki Nagasawa
日本語
Dr. Guilty
Supporting
Tomomichi Nishimura
日本語
Yagami
Supporting
Takashi Nagasako
日本語
Night Phantom
Supporting
Akio Ootsuka
日本語
Le Bled
Supporting
Takeshi Kusao
日本語
