Undercover policeman Gan Tianlei has been lurking in a drug lord group for more than ten years. He was in a coma for eight years and lost his memory due to an explosion. After waking up, in order to solve the unresolved case and protect his daughter, he went deep into the gray zone with his broken memories for the second time, dealing with the forces of the Caesar Group and the Tan family. The series shows the forbearance and sacrifice of anti-drug police officers in a realistic way. In the high-energy plot of the game between good and evil, it conveys the iron-blooded determination to fight drugs and the mission of the public security police.
