Deng Zijun suffers from schizophrenia and is discriminated against upon discharge from the hospital. Fortunately, his mother and a passionate social worker, Fang Yuting, accompany him. Zijun becomes a part-time social worker through Yuting's recommendation. However, the cases with whom Zijun has conflicts happen to be killed. Zijun discovers evidence of the killings on himself, and the police start investigating him, causing him to doubt himself.