恐怖组织首领泰坦获得一枚新型原子武器，威力惊人。退役特种兵汪岩带领毒狼小队抓捕泰坦，意外让泰坦老婆安美逃脱。安美针锋相对，绑架汪岩女友。汪岩为营救女友中计，丢失原子武器。安美以原子武器相威胁，要求释放泰坦。就在安美迎接泰坦归来时，发现泰坦是汪岩假扮。一场惊天动地的生死搏杀就此展开

　　添（曾志伟 饰）、Dr Lee（陈小春 饰）、娇（张达明 饰）以及大学生阿仔（黄又南 饰）平日在老婆或女友面前总是毕恭毕敬，百依百顺。其实四人都心怀鬼胎，那就是在取得他们的另一半信任之后找机会出去鬼混。　　Mary（毛舜筠 饰）、绮贞（原子鏸 饰）、娇妻（何超仪 饰）和阿Ling（林苑 饰）是四人的伴侣，一开始她们都以为自己的另一半对自己始终如一。但四人渐渐识穿了男人们的诡计，羞愤之余，四人订立了攻守同盟，决定一起出去鬼混，以牙还牙。　　男人们知道了自己的另一半亦开始红杏出墙后，大为紧张，开始跟踪自己的老婆或女友。他们之间的危机最终能否顺利化解？

Based on the novel by Karel Capek, the prominent Czech writer of the early 20th century who coined the word robot for his play R.U.R., the story revolves around a discovery of Krakatit - a powerful explosive - by Prokop, an experimental scientist who, following an accidental explosion in his lab, slips in and out of delirium. When he realises that, in a delirious period, he has given the formula for making Krakatit to one of his colleagues, he tries to find the man, who does not realize how dangerous a thing Krakatit is. In the process, he nearly gives his discovery away again to foreign interests, a group of anarchists, and even greater forces of darkness...

一场在极圈进行的原子弹爆炸实验，释放了冰层中沈睡一亿四千年的恐龙，这只恐龙跑到纽约市大肆侵略，造成巨大恐慌。

　　在不久将来的2025年，奥西讯技术总工艾比·狄克逊，前往修理遏核电设备，根据神秘的线索和一些奇怪行为，艾比对该站两名员工的神智和身份产生了怀疑。