The story of the film takes place in Huilonggang, a small town in the late Republic of China. This place is isolated from the world and looks like a paradise, but it is actually full of weird things that make people shudder. In particular, the patriarchs of the four major families in the town have died tragically one after another. As people investigate in depth, all the evidence points to a terrifying castle on the edge of the town, and the guardian of this castle will bring more bloody, bizarre and suffocating weird things...