HMCH

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.

The film tells the story of a "new mission" from the Monster Hall. Faced with a series of mysteries, Xiaohei and his senior sister Luye embark on a new adventure to find the truth.

On a rainy night, a stray black kitten is taken in by a young girl named Luo Xiaobai and she named the kitten Luo Xiaohei. Xiaohei is no ordinary cat; he is remarkably intelligent—using the toilet and refusing cat food—and possesses a long tail capable of splitting into mysterious, small creatures known as "Heixiu." Meanwhile, a mysterious figure named Diting dispatches three wolves—capable of shapeshifting into birds—to track Xiaohei down. Soon after, Xiaobai takes Xiaohei to the countryside to visit her cousin A Gen and her grandfather, setting the stage for a series of bizarre and fantastical events. (Source: Douban, translated & edited)