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.

Alternative title:

Steam Detective:

• 1. Go! Steam Detectives
• 2. The Challenge of the Crimson Scorpion
• 3. Machine Baron's Abnormal Love
• 4. Rival, His Name is Le Bled
• 5. Shadowbolt
• 6. 紅サソリ七変化
• 7. 緊急指令！強力を逮捕せよ
• 8. 誰がために君は走る
• 9. 復讐人(ふくしゅうじん)ファンタム
• 10. 強力ピンチ！
• 11.Steam Fantasy
• 12. The Machine Baron's Fatal Error
• 13. Narutaki vs. Ling Ling: A Tiny Battle
• 14. Novel: "The Horrific King Steam"
• 15. The Target is Onigawara
• 16. Tears of a Black Angel
• 17. Go After Submarine X!
• 18. 36 Pages in a Detective's Pocketbook
• 19. Pale Crimson Memories
• 20. Goodbye Young Detective
• 21. La Bled’s Invitation
• 22. Rivals, Eternally
• 23. The Final Plan
• 24. The Approaching Demon’s Shadow
• 25. And Then, There Were None
• 26. The Imperial Capital is Waiting For You