A former police officer gets dragged into a game of cat and mouse initiated by an intelligent killer to punish criminals outside the law.

The story of Lu Zhonglei, captain of the Public Security Anti-Narcotics Brigade, during his life-and-death contest with drug lord Ling Shaohua. As the protagonist of the story, anti-drug policeman Lu Zhonglei experienced the test of life and death, physical and mental torture, and the sacrifice of his companions during the dangerous anti-drug arrest process. However, he still did not forget his original intention and was unswerving. In the end, through careful thinking and hard work, With his skills, and with the full support and cooperation of the leadership and other anti-drug police officers, the cunning drug lord Ling Shaohua was hunted down and brought to justice.