Ye Kuan, the police chief of the serious crime team, meets his old classmate Xu Shibang. Xu Shibang was involved in a bizarre murder case. And become a witness. Ye Kuan collected evidence to find out the real murderer, and then Xu Shibang learned that his old classmate's true identity was the legendary demon hunter.
In Shanghai, an ancient and lively city, demons, gods and ghosts live in a mixed environment. The young demon hunter not only maintains the order of mankind, but also maintains the peace of other worlds.
Xu Shibang, who was ignorant of the other world, became the demon hunter's assistant and partner. In the bloody dusk, let's go on the road together.