From the late 1930s to the summer of 1931, Shanghai. White terror enveloped the country, and the CCP's underground organizations were repeatedly destroyed. The undercurrent of the ten-mile foreign market is turbulent, and the agents of the Kuomintang and the Communist Party are fighting to the death in the neon lights and shadows. As the "sharp knife" of the hidden front, the Red Team adheres to the "Three Principles of Eliminating Traitors" and is responsible for eliminating internal traitors and enemy agents who pose a great threat. Its members are all dead soldiers with firm beliefs and superb skills.