Shock Wave

Officer Cheung (Andy Lau) is the most respected member of the Explosive Ordnance Disposal (EOD) unit. Before rising through the ranks, Cheung worked undercover within a criminal gang, led by a ruthless crime boss notorious for his expertise in explosives. After Cheung's undercover work leads to the breakup of the gang and the arrest of the boss's brother, the gang boss swears to take revenge on the man responsible for ruining him.