When his forest is destroyed, the wood sprite Xiaohei takes the form of a cat and goes to live in the city, where the hybrid Fengxi (Stormend) befriends him. However, there are enemies on their trail.

In bustling human world, various of goblins live peacefully with mankind. Luo Xiao-Hei, the cat demon, begins his journey of wandering because his forest home is destroyed. With sympathetic goblin partners and earnest human master appearing one after another, Hei is in the dilemma of which side will be his true attribution.