In this city, the deadliest ghosts are not wandering the streets, but lurking in people's hearts. They feed on trauma, solidify rules, and form unsolvable "heart abyss" weird stories. Psychological counselor Lin Yuan is a rare "diver" who can penetrate into the psychological shadow of patients, crack the deadly rules, and conduct the most dangerous diagnosis and treatment. When a series of bizarre suicide cases pointed to a "mentor" who fed on pain, Lin Yuan discovered that the "heart gap" between himself and the patient had already become each other's hunting ground. Healing has become a life and death game of escaping within the rules and stealing fire in the dark. He said: "Don't be afraid, there are rules for killing hidden in your psychological shadow, and my job is to help you modify it."
