Episode 1
Li Fei and Song Yang of the Anti-Drug Brigade of the Public Security Bureau of Dongshan City attacked Tazhai at night, but after being captured by drug dealer Lin Shengwen, they were besieged by villagers and the physical evidence was destroyed. During the interrogation, Lin Shengwen was arrogant, but Li Fei gave testimony. Li Fei and Song Yang investigated Lin Shengwen’s mistress Zhou Lin’s home and learned that Lin Shengwen was released on bail pending trial. Song Yang accidentally leaked Lin Shengwen’s testimony to Cai Jun. The next day, Lin Shengwen died at home. Song Yang received nude photos of Chen Ke who had been in ps and lost contact with Bao Xing. Li Weimin, deputy director of the Narcotics Control Bureau, launched a counter-narcotics operation. In order to seize a one-ton drug deal, Li Weimin carried out sophisticated deployment.

Episode 2
In order to save Song Yang, Li Fei came to the Beishan chicken farm and had a fierce battle with Cai Jie and others. He fainted after being injured. Song Yang was also killed by Li Fei’s pistol. Hong Kong businessman Zhao Jialiang received a call from his subordinates while dealing with drug dealers. Zhao Jialiang decided to cancel the transaction immediately. Chen Ke’s brother Chen Yan was arrested, confessing that Li Fei was involved in drugs and setting up a bureau to kill Song Yang. After being wounded and hospitalized, Li Fei escaped from the assassination and fled to find Bao Xing, the person involved. The case of “policeman killing policeman” has huge social impact. With the help of Lin Shuibo, Li Fei contacted Chen Ke. In grief, Chen Ke chose to trust Li Fei and informed Li Weimin about Li Fei’s appointment with her at Fengyi Hotel.

Episode 3
Li Weimin moved to avoid the case, saying that Li Fei sympathized with his father and son, and believed that Li Fei would not be involved in drugs. He secretly informed Zhao Jialiang to go to Li Fei and tried to find Li Fei with Chen Ke. Li Fei went to Feng Yi Hotel to find Chen Ke, but was ambushed at the door. Li Fei grabbed a taxi and fled from Fengyi Hotel, and was captured by Zhao Jialiang’s men. Zhao Jialiang released Li Fei at the request of Li Weimin. Li Fei came to Baoxing Company at night and met Li Weimin. Li Weimin persuaded Li Fei to return to the police station for questioning. The Ministry of Public Security learned that Li Fei’s mother was sacrificed and his father fled to Hong Kong when he was young. He was later raised by Li Weimin. Zhao Jialiang found the location of drug dealer Liu Huaming.

Episode 4
Liu Huaming was captured by Zhao Jialiang’s men and severely tortured. The Ministry of Public Security called Li Weimin to report his job in Beijing. Vice Minister Hao ordered the establishment of a joint investigation team to eliminate the Dongshan drug production base under the pretext of investigating the May 13 case. Li Weimin is the team leader and Zuo Lan is the deputy team leader. Cui Zhenjiang asked Li Fei about Cai Yongqiang. Facing the joint investigation team, Ma Yunbo told the past that Li Fei was saved. Li Fei stated that he would not investigate the case of Chen Ke’s brother Chen Yan, and he would not say anything. The past between Chen Ke, Song Yang and Li Fei surfaced. Li Weimin discovered that Chen Yan might be threatened and decided to interrogate Chen Yan himself.

Episode 5
Under the interrogation of Li Weimin, Chen Yan was full of loopholes, admitting that he was threatened with perjury. Zhao Jialiang threatened with Liu Huaming’s wife and children, and Liu Huaming confessed to the middle man. The masses in Dongshan were deceived and protested publicly, protesting against Li Weimin as the leader of the joint investigation team, and the police station closely followed the mass incident. Li Weimin moved to the scene of the demonstration and found out criminals who incited the masses. After Li Fei learned that Chen Yan had cleared his grievances, he told the investigation team the whole story of Lin Shengwen’s case, and pointed his finger directly at Cai Yongqiang. Cai Yongqiang was interviewed, and Cai Yongqiang gave a clear explanation of all the doubts raised by Li Fei.