Introduction：A new type of methamphetamine has emerged in City A. Vice captain of the Anti Drug Brigade, Mogao, set his sights on a drug trafficker who was lame. However, due to a negligence by young police officer Wu Haowei, the lead was interrupted, and Mogao learned that the drug trafficker who came to City A was Captain LiuOld rival Tao San. Xiao Wu secretly followed Mo's team and discovered the informant Manchester United. While searching for clues, he was discovered by Tao San's top subordinate Hua Arm. Fortunately, Manchester United claimed that Xiao Wu was under their command and escaped unscathed. To make up for mistakes,Wu, who is eager to make contributions, requests an undercover operation. Xiao Wu and Manchester United kept buying drugs from Hua Arm, taking advantage of the opportunity to propose a bulk deal and enticing Tao San to appear. Manchester United's identity was suspected during the transaction, Mo teamPersisting in pursuit and being injured by the explosion, Manchester United is killed. The death of Manchester United dealt a heavy blow to Mo team and Xiao Wu. The two of them, Master and Apprentice, vowed to catch the drug dealers to the death. As a result, Mo team and his girlfriend Xiao Ru also developed an emotional connectionEstrangement. A colleague from the neighboring province has received news that another batch of drugs will be transported to City A. Team Mo knows this is an opportunity to capture Tao San.