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

Narutaki
Main
Crimson Scorpion
Supporting
Dr. Guilty
Supporting
Hsu, Lang Lang
Supporting
Le Bled
Supporting
Machine Baron
Supporting
Narrator
Supporting
Night Phantom
Supporting
Onigawara
SupportingRecommended for you
Immortality
ONA
24m
The Soul of Soldier Master
ONA
15m
The Westward 3rd season
ONA
15m
Bakugan: Evolutions
ONA
22m
Cap Revolution Bottleman DX
TV
12m
Dragon's Disciple
ONA
20m
Martial Universe 3rd Season
ONA
25m
Word of Honor
ONA
19m
Supreme Galaxy
ONA
7m
Supreme Galaxy 2nd Season
ONA
7m
BeyWarriors: Cyborg
TV
24m
Throne of Seal
ONA
21m
Rift
TV
26m
The King's Avatar 3
ONA
19m