Based on Zhang Muye's novel "Fire God from Jiuhe". The story takes place in the Jiuhe city in the middle of the Republic of China. The thief Qian Buer accidentally obtained the identity of a police detective and was determined to rescue the junior thief who was arrested in the detective agency. Zhang Lisan encountered a difficult petrochemical case when he took office. A contractor was "cursed" after demolishing the Huoshen Temple and became a stone statue in full view. Then the "curse" of Vulcan spread throughout the city.

　　本片根据天下霸唱小说《火神》改编，故事发生在民国年间九河下梢、鱼龙混杂的九河城，神偷钱不二意外获得警探身份，决心去救被捕在侦探社中的师弟侠盗张立三，却在上任之初就遇到了棘手的石化悬案。一名包工头在拆毁了火神庙后遭到“诅咒”，在众目睽睽之下成为一尊石像。随后火神的“诅咒”更是在全城蔓延，神偷钱不二、侠盗张立三、苏叶、小神婆半夏被迫卷入其中，开始寻找真相，并意外发现了魔古道筹划已久的惊天阴谋......