Chen Hao and Xu Cuiniang's secret meeting in the cornfield is interrupted by a black cat. After Chen Hao smashes the cat, strange events keep happening at home: cat blood stains appear on clothes, the water vat shatters at night, and Chen Hao develops a fever with black fingernails. Chen's parents believe their son is haunted by a "cat demon". Through Xu Cuiniang, they find Master Zhou, who racks his brains to devise plans to solve this series of bizarre events. The arrival of Master Zhou makes things even more enigmatic.