Twenty years after Professor Yu’s tragic death while trying to stop the new drug MG32, traces of the drug resurface in an overseas murder case, indicating the return of drug lord Sha Kun. Now, Yu’s son, undercover officer Yu Fei, teams up with law enforcement in a high-stakes operation to take down the powerful international drug syndicate.

Returning to find his family murdered, a man infiltrates a local warlord for revenge but uncovers a larger conspiracy.