Tang Yuan rents an old house and accidentally awakens his superpower. He can command rats and cockroaches to collect clues. Late at night, Mouse live-streamed the scene of her neighbor's murder. She drew a portrait of the murderer to help criminal investigation team leader Zhang Yuelin solve the case. Faced with workplace harassment from her boss, she used cockroaches to collect evidence, and was accidentally involved in a murder case to uncover the real culprit. After becoming a special consultant to the police station, she solved another major case of corpse burial on a rainy night. The cockroach brought back top-secret information that alarmed the national security. Tang Yuan was appointed director of the Pest Control Center and became the secret eye guarding the city.
