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.
(Source: ANN)+ More
Characters & Voice Actors

Hsu, Ling Ling
Main
Taguchi, Hiroko
Japanese
Narutaki
Main
Hoshi, Soichiro
Japanese
Crimson Scorpion
Supporting
Yokoyama, Chisa
Japanese
Dr. Guilty
Supporting
Nishimura, Tomomichi
Japanese
Hsu, Lang Lang
Supporting
Nagasawa, Miki
Japanese
Le Bled
Supporting
Kusao, Takeshi
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