Under the surface of the bustling city, there is a mysterious and ancient world of cultivation. Lin Feng, a retired special forces soldier who is now a private detective, was forced to step into this unknown field due to the mysterious disappearance of his sister Lin Yue. He used his special forces background and his unexpectedly awakened cultivation ability to travel through the dark side of the city, uncovering layers of fog and searching for his sister's whereabouts. In the process, he not only has to face the mysterious power from the world of cultivation, but also the complex entanglements of urban crime and the dark forces hidden under the light.
