Ai Xiu, an eighteenth-generation descendant of a family of veterinarians, takes a job at a remote mountain zoo for a monthly salary of 100,000. However, he soon discovers that the place is actually a secret sanctuary dedicated to caring for elderly and disabled spirit beasts. Faced with a group of ancient ancestors from the cultivation world who have lived for hundreds or even thousands of years, Ai Xiu goes from being so terrified that his legs tremble to gradually fitting in through his family's traditional medical skills, delicious food, and all sorts of unconventional retirement-care methods. The spirit beasts go from making fun of him to treating him like one of their own younger family members, teaching him ancient cultivation techniques and casually gifting him precious magical treasures. But when powerful cultivation families arrive to pay their respects to their ancestors, they are shocked to discover that this seemingly ordinary mortal veterinarian has already become the young man with the strongest backing in the entire cultivation world.