On the eve of veterinarian He Wan's mourning, her companion yellow dog Dahuang died blocking a car to save her, leaving behind final words that in the next life he would switch to guarding her. After a flash of lightning, she returned to her hometown, only to encounter an old dog named Dahuang with identical markings on its brow and tail tip who could even speak. Her grandmother has passed away, and the villain Qian Guangjin arrives with a fake IOU to demand debt and seize the house, setting a fifty-day limit. Carrying the dog king Dahuang, the injured fighting dog Heihu, the motherless tiger cub Shanjun, and a crowd of human-like animals, He Wan step by step exposes the dark secrets of poaching and forged debts. What is guarded is not just a home, but a guardianship and reunion spanning two lifetimes.