Liu Sixi, the son of the rich second-generation demon-hunting family of the Liu family, is extremely talented. Any demon or person who absorbs his essence can greatly increase his power. However, he is also a playboy who hangs around with women all day long. Jiumei is the youngest princess of the Fox clan. She is kind and lovely, but she is also an "inventor" and "trickster." Jiumei wants to obtain Liu Sixi's essence for her mother, so she sneaks into the Liu family. Unexpectedly, the two secretly fall in love, and their enemies become lovers. From then on, the romantic demon hunter and his savage fox fairy girlfriend staged a ridiculous story of chasing the love of a fairy and a demon.