On the eve of the 1997 handover, violence is rampant as the British Hong Kong government has joined forces with the triads to cause chaos in Hong Kong. The gang leader, Lam Yiu-Cheong (Simon Yam) assigns his crony Ah Lok (Richie Ren) to take an important role in the destruction. But Lok harbours a secret – he’s an undercover policeman and he’s about to discover a political conspiracy that will shock the country to its core. 1997年回归前夕，多方势力矛盾激化，暴力事件频发。巨变当前，黑帮龙头林耀昌（任达华 饰）对亲信阿骆（任贤齐 饰）委以帮派重任。多重身份的阿骆在黑白边缘行走，一场除暴行动正悄然掀开反杀的序幕。