黑帮老大“校长”想金盆洗手，孙膑却被女友小嫂和手下阿一( 吴庆哲 饰)出卖，孙膑并遭到追杀。“校长”将自己瑞士银行的密码告诉了孙女小雨，并给了她两张半截的美钞，声称关键时刻寄出，能得到江湖传奇人物神枪手和智多星的保护。 阿一为了获得“校长”的巨款与境外的老大钟胜一（曾志伟 饰）合作，杀死了“校长”，并四处寻找小雨的下落；警方派出了菜鸟警官王小飞（方力申 饰）保护小雨，小雨也寄出了求救信。于是，智多星（黄秋生 饰）和神枪手（吴镇宇 饰） 重出江湖，他们除了要和阿一斗智斗勇之外，还要时时警惕来自身边的危险……
曲佑良
回复 :China O’brien; big city police woman; martial arts trainer, is forced to hand in her badge and head home to her father and the small town where she grew up. The peaceful town she knew is now struggling against the clutches of organized crime. When her father, the town sheriff, is killed China decides to run for his position and clean up the town. The poll results spark a series of confrontations that finally decide who runs the town
猎虹乐团
回复 :本该是场浪漫的周年纪念旅行，直到风趣的他出现，意外的插曲让这对年轻夫妇深陷危机，如处地狱…
杨蔓
回复 :本片主要讲述了一支受恶魔控制的水管，经常出来吓唬那些本性还算不坏的瘾君子们。作为一部向B级恐怖电影致敬的片子，剧中充满了无厘头式的搞笑。