调查局机动组组长方国辉（刘德华）为人干练嫉恶如仇，与手下对周朝先（梁家辉）经营的电玩场进行监拍时，拿到其经营地下赌场的证据，将其告上法庭，岂料法官被收买，周朝先被判无罪当庭释放。与黑金挂勾的侯部长（李立群）暗中施压，调查局勒令方国辉休假，停止对周朝先的调查。周朝先为进一步控制台湾的政治，在记者会上公开声明要退党参选立法委员，欲与代表党竞选的黑帮老大丁宗树对着干。方国辉沮丧之际，得电视台女记者凌飞（吴辰君）和法务部冯部长的鼓励重回工作岗位，却被丁宗树盯上，欲将他杀死后再嫁祸周朝先，好一石二鸟。
香港高级警司罗聪天触犯贪污条例，被迫逃往美国，其子罗宾在港夺得黑帮名册，赶往美国交给聪天，希望能洗脱父贪污的罪名，黑帮杀手亚健、小文追踪至美国。摧花狂魔魔鬼鱼四处作案，残害少妇。罗宾之弟米高和街头女霸王大姐大之妹一同遇害，罗宾与大姐大发誓要掀到凶犯。亚健、小文勾结美国黑帮暗杀了聪天，但名册却失踪，追查魔鬼鱼的罗宾又被亚健一伙追杀，在其腹背后敌之际，邂逅了聪天的义女珊珊，得知名册由她保存，罗宾与大姐大在警方的配合下消灭了魔鬼鱼，亚健一伙也被绳之以法。最后罗宾携带名册，只身上路……
Ray 'Harley' Davidson is a hustler. With flash clothes and a fast mouth, Harley lives life in the fast lane. With his passion for all things gambling, money runs like water through Harley's hands and as quickly as he makes a killing he takes a beating,
A young woman is killed on her way home from a lavish yacht party and a suspect is identified as a veteran who had been on several Army operations with Crosby.by:www.tuikan.cc