On their way home from Brooklyn, psychiatrist Vic, daughter Julie and sister Stacey run short of gas. They leave the highway to search for a petrol station - but end up erring around in South Bronx. A youth gang led by the sadistic Ice stops their car and starts terrorizing them. Without fuel, the 3 women soon have to flee by foot and defend their life with all means possible.

正在休假的警察Darren（郭富城）与好友兼搭档Alex（王力宏）一起出席后者女友的时装发布会时，目睹一桩谋杀案，两人立刻停止休假投入到了破案中。调查时，两人发现案件异常复杂，牵涉到大陆南方某城的一个庞大的犯罪组织，赶赴到该城后，两人结识为调查一宗涉及国际犯罪组织的案件而深入虎穴当卧底的国际刑警Norika（藤原纪香）。 为引出大鱼，Norika铤而走险假扮模特儿走秀，Darren与Alex则在暗中观察，当等来目标人物与之发生枪战时，Alex不幸中弹身亡。伤心至极的Darren发誓要将黑帮铲除，他和Norika也渐渐生出感情。