More than 20 years ago, Yu Fei's father, Professor Yu, was killed in order to prevent the advent of the new drug MG32, and the drug lord Sha Kun escaped. Twenty years later, in a murder case abroad, traces of MG32 were found, and Sha Kun reappeared. At this time, Yu Fei, an undercover anti-narcotics policeman, cooperated with the police to wipe out the international drug trafficking organizations.