Lin Zhixia is a pet beautician. Good news: She's got a pair of hands that can make even the most ferocious dogs as docile as marshmallows. The bad news: Her clients often come with items they shouldn't have—like blood stains deep in their hair, or special fibers caught in the gaps of their collars. At first, Lin Zhixia thought it was just an ordinary accident. Within a week, the three pets she received all came from the same community, and their owners disappeared one after another. Police: "Ms. Lin, you are over-associating. Disappearance cases are all about evidence." Lin Zhixia: "The evidence is in the foot pads of this Pomeranian. It is a special ingredient that is only found in high-end perfumes of a certain brand. And its owner is allergic and will never use this kind of perfume." Without a system or mind-reading skills, Lin Zhixia relies on her extreme study of pet behavior and solid criminal investigation knowledge. Which door does the cat's scratching mark lead to? What smell is causing the anxious tremors in dogs? When the owner disappears into the surveillance blind spot, the pet becomes the only witness. Lin Zhixia became a non-staff consultant to the police station. A police officer: "Teacher Lin, this cat is not in a good mood today, can you help me ask?" Lin Zhixia: "... It is a cat, not a human. But I can tell you through its pupil dilation that it witnessed the murder last night." This is a story about the life and death of "hairy kids" and "detectives". After all, the murderer never calculated that he would be betrayed by a dog.