Sun, the captain of Jinhai Anti-drug Brigade, has just completed the undercover task and successfully captured a group of drug dealers, but he met Louis Koo, who was injured in a car accident out of control in the hospital. With a keen professional sense, Zhang Lei decided that Timmy Choi was suspected of making drugs, and then found out the drug-making dens that had been bombed in a big mess. At the same time, Guo Weijun (Wallace Chung) and Chen Shixiong (Li Guangjie), two anti-drug policemen from Yuejiang, followed the truck carrying drug raw materials and met them. They learned that the drug raw materials came from Chen-Piao Li, a drug Lord, and the consignee was Timmy Choi! In the face of the facts of the crime, Timmy Choi confessed and offered to help the police capture Li Zhenbiao, making meritorious service.
Subsequently, the police in Jinhai and Yuejiang, headed by Zhang Lei, disguised themselves as buyers and launched an adventure game with Li Zhenbiao's drug trafficking gang. At the same time, they should always be on guard against Timmy Choi's escape and kill each other. In the end, Zhang Lei discovered the shocking secret of Li Zhenbiao, and it was inextricably linked with Timmy Choi. Zhang Lei realized that this Timmy Choi might not be his pawn, but he was on the chessboard. Before a shot was fired, the drug war had already begun.