Based on anti-drug cases, the drama tells the story of Zhang Zhuoying (Zuohang), a female police officer of the anti-drug detachment, and Wang Xingjian (played by Wang Xingjian), who loves advanced technology but has a loose personality, and fights wits with drug dealers. With the clues of tracing the new type of drug C2, which is a huge hazard, this drama uncovers a huge drug case involving the older generation of anti-narcotics police officers such as Zheng Xiao (played by Bai Yongcheng) and Zhang Xudong (played by Li Youbin) 24 years ago. With the concerted efforts of two generations of public security officers, they were caught in a dangerous situation and fought life and death with drug lords, and finally cracked a huge drug trafficking and production case with C2 as the source, and the main envoy also surfaced.