Lv Mingzhe (Andy Lau) is a senior inspector of Hongkong old record repeatedly, Tao Chengbang (Ka Tung Lam decoration) is incorrigible just out of prison street. Lv Mingzhe in a street confrontation bandit leader Cao Nan (Hu Jun decoration) has the upper hand, by childhood friend Tao Chengbang came. Facing the increasingly aggressive criminal gang, Lv Mingzhe oath at all costs to all, cop sides killing game start.
At this time Tao Chengbang and girlfriend Yan Bing (Chen Yao decoration) found a boyfriend anomaly, to win back disappointed with myself girlfriend, Tao Chengbang and Lv Mingzhe reached a deal!