A meticulously-planned retaliation begins when eight writers are kidnapped and imprisoned in a warehouse to play a game of life and death. Everything starts and ends because of police cadet Gu Dai who relies on deductive reasoning to solve the case. Gu Dai who is about to graduate from Ningcheng Public Security University becomes involved in a series of kidnapping cases involving eight writers after he starts his internship with the criminal police. Just when he thought that he had figured things out, all the clues start to lead to him as the prime suspect. In this game, the only way out is to break the rules but this is a game where foul play is not allowed. As the case progresses, the truth is slowly revealed.