Synopsis：Special agent Li Xu infiltrates a drug cartel undercover to dismantle the drug lord's stronghold. To trace the source of the narcotics, he deliberately approaches the boss's mistress, Ah Mei, but is discovered. Ruthless and cunning, Ah Mei kidnaps Zhang Siyi, the sister of Li Xu's good friend, and demands that Li Xu transport drugs for her. She straps a bomb onto Zhang Siyi and monitors Li Xu via video feed to prevent him from calling the police. The bomb is set to detonate automatically in two hours. Li Xu must end this life-or-death game before the explosion...