The younger brother "Li Sanya" was sent to Qingshan Hospital as a schizophrenic by his family on the day he came out. It was discovered that all the patients were suffering from evil spirits. In order to save himself, he pretended to be crazy during the day and deceived the doctor, and at night he consulted for patients and accumulated merit points. Unexpectedly, the merit value was so high that it alerted the National Security Bureau 749. With a secondment from the bureau, the entire hospital was classified as a "National Paranormal Affairs Pilot Unit." Li Sanya went from working illegally to becoming a "non-staff special consultant", leading a group of mental patients to kill demons. Finally, he discovered that the biggest demon was actually the "fairy family" in his body, and Qingshan Hospital itself was a demon-suppressing tower...
