Everyone in Spirit Beast Valley mocks Sang Li, a humble servant responsible for sweeping, for spending every day looking after an ugly, clumsy little black pig. Little do they know that this little black pig is actually Hei Heng, the Demon Venerable who has lost his memories. Sang Li feeds him special spirit-dispersing fodder and keeps him company day and night. Despite the criticism from the entire valley and the dangers lurking on all sides, she steadfastly protects the little black pig and stands up to everyone who opposes her. As they continue to accompany and protect each other, the bond between the girl and the pig grows deeper. Meanwhile, fragments of the Demon Venerable's memories keep returning. This journey of raising a pig, filled with layers of hidden schemes, has only just begun!