Destitute veterinarian Lin Yan inherits his grandfather's failing animal clinic and unexpectedly activates the "Neuter to Get Stronger" system. By neutering male animals, he unlocks divine medical skills, masters animal language, and can understand the inner thoughts of animals. While live-streaming as the "Neutering Miracle Doctor" to treat illnesses and pamper pets, he builds an intelligence network of stray cats and dogs called the "East and West Depots" to counter the harassment and retaliation of local bully Zhao Dayong. At the same time, he travels far and wide on house calls, running from town cats and dogs to Inner Mongolia to save a sweat-blooded divine horse, and deep into the mountains to rescue an endangered panda. Relying on his systemic abilities and extraordinary courage, Lin Yan resolves crisis after crisis, rising all the way from a bankrupt minor veterinarian to a legendary veterinarian known far and wide.