Li Zhengbin (Hei Zi), Wang Hui (Li Fei), and Yu Zhenhai (Hao Shu) were comrades-in-arms from the special forces. After retiring, they were recruited by the special police detachment to become special police. During a secondment, Yu Zhenhai went undercover in the organization of drug lord Zaka (Jin Song). Unexpectedly, he was discovered and killed by Zaka's men during a transaction. During the carefully deployed investigation by the police, another more powerful drug trafficking organization headed by Tan Xiaoshan (Yang Zihua) was unearthed. Gang, it turns out that the two forces of Tan Xiaoshan and Zaka have always wanted to monopolize the market and swallow each other. In order to capture the two drug traffickers, Wang Hui took the initiative to apply to sneak into the drug dealers, and repeatedly saved Tan Xiaoshan's only son Tan Zilong under the alias Chen Changping (played by Li Fei) and gained his trust. On the other hand, after Li Zhengbin became the captain of the anti-drug detachment, his capable general Zhao Yongjun (played by He Da) and his subordinate Zhang Lei (played by Yang Junchao) influenced some drug dealers to become police informants and collect evidence of criminal organizations. But Zhao Yongjun and Zhang Lei did not know the existence of Chen Changping and almost hurt him. In order to avenge her dead husband, the single mother Xiaomei (played by Ge Bu) was grateful to Chen Changping for saving her mother and son. She took the initiative to apply to become an informant for Chen Changping and Li Zhengbin. Chen Changping set up a bureau to take down the two evil forces at the same time. With Li Zhengbin and the two inside and outside, a thrilling action to combat drug trafficking organizations began...