Outside Nancheng Mingqi Middle School, three students suddenly disappeared. Soon, "student kidnapping cases", "teacher murder cases", "headless corpse cases", "rich man murder cases" and "high-ranking official assassination cases" occurred one after another. The police intervened in the investigation, and a man named Duan Xiaer was involved in the case. As the investigation continues to deepen, the truth from twenty years ago emerges, but who is Duan Xiaer...
Purpose: Exploration of human nature