Anti-drug cop Yi Yongzheng is assigned to investigate drug-related cases and reunites with his old friend. Back then, in order to save her son, Ding Zhitong joined a drug syndicate. She is attacked from all sides, and her husband also dies because of her. Learning from her mistakes, Ding Zhitong decides to hand over the evidence to Yi Yongzheng. Unfortunately, her actions have already been seen through. Later, she joins forces with Yi Yongzheng to wipe out the drug trafficking syndicate, and she then also accepts legal sanctions.