凯斯特（尼古拉斯?凯奇 Nicolas Cage 饰）是一个恐怖分子，他本想杀死探员西恩（约翰?特拉沃塔 John Travolta 饰），却误杀了西恩的儿子，西恩更与凯斯特结下不共戴天之仇。在逮捕凯斯特归案之后，他以为可以划上句号，却得知凯斯特已经把一枚毒气炸弹投放在某个人群密集的角落。为了查出炸弹地点，西恩决定利用整形手术，将昏迷中的凯斯特的脸换在自己身上，去假扮凯斯特身份套出他弟弟说出真相。这件事属于FBI高度机密，只有寥寥几人知情。凯斯特醒来，此时他有着西恩的面相。于是他决定将计就计，将知情人杀掉之后，他就变成了西恩……

George Washington McLintock, "GW" to friends and foes alike, is a cattle baron and the richest man in the territory. He anxiously awaits the return of his daughter Becky who has been away at school for the last two years. He's also surprised to see that his wife Katherine has also returned. She had left him some years before without really explaining what he done but she does make the point of saying that she's returned to take their daughter back to the State Capitol with her. GW is highly respected by everyone around him including the farmers who are pouring into the territories with free grants of land and the Indians who are under threat of being relocated to another reservation. Between his wife, his headstrong daughter, the crooked land agent and the thieving government Indian agent, GW tries to keep the peace and do what is best for everyone.

刑警Mike（吴镇宇 饰）和阿仁（古天乐 饰）是一对拍档兼好兄弟，两人一个性格孤僻、沉默寡言，一个玩世不恭、愤世嫉俗，均不得上司赏识。为了缉捕劫匪“毒龙”一伙，两人在独居老人四婆（罗兰 饰）家中布置了监控装置。期间，孤儿院长大的Mike结识了被男友遗弃的孕妇Jennifer（林美贞 饰），表示愿做孩子的父亲，而阿仁也结识靓妹阿Yen（郑雪儿 饰）。不久，Mike知晓自己身染绝症，来日已经不多，为了Jennifer以后的生活，他与“毒龙”私下进行交易获得鉅款。同时，不忘职责的他又将“毒龙”的行踪通知阿仁，并与之一起同“毒龙”展开搏杀。

有一只小象，因为耳朵特别的大而遭到了嫌弃。过气的马戏团明星霍尔特（科林·法瑞尔 Colin Farrell 饰）带着一双儿女米莉（妮可·帕克 Nico Parker 饰）、乔（芬利·霍宾斯 Finley Hobbins 饰），成为了小象的照顾者，他们非常喜欢小象，给它取名小飞象。一次偶然中，父女一行人震惊的发现，小飞象竟然真的会飞，这消息一经传出，市民们纷纷买票来到马戏团，想看一眼这奇妙的景象，本来濒临倒闭的马戏团因此而重获新生，小飞象也一夜成名。大企业家范德威尔（迈克尔·基顿 Michael Keaton 饰）在小飞象的身上发现了商机，于是抛出橄榄枝，邀请小飞象到自己的俱乐部工作，然而没过多久，霍尔特就发现，范德威尔表面上光鲜亮丽，实际上是一个吃人不吐骨头，眼里只有金钱的贪婪资本家。