The story is adapted from the folk legend "Zhong Kui Conquers the Demon". Every thousand years, there is a solar eclipse, when the spiritual power of Kunlun Mountain is the weakest and the yin energy is the strongest. At this time, the magic well of Kunlun Mountain is opened, the magic energy surges out, and all the demons are dispatched. The demons may possess ordinary people, absorb human yang energy at night, and the eroded people are weird and cruel; or they may turn into human form to prey on humans. Horrible supernatural events continue, and it is difficult to distinguish between humans and demons. The world is as gloomy and terrifying as hell. Zhong Kui, a Jinshi from Zhongnan Mountain, is not afraid of evil spirits. He and his master slay demons and eliminate monsters, but he finds that behind the monster, there is a more shocking, more terrifying, and more difficult truth waiting for him...