Two men and a woman circle the globe in a satellite armed with a nuclear device. The third world war breaks out, and a few months later the satellite crashes. They survive the crash but one man gets killed by survivors and the other man gets caught. The woman stays by the remains of the the satellite but is soon caught by evil punks who have taken power.
When an alien hunter arrives on post-apocalypse Earth, it takes down a gang of warlords and unexpectedly becomes a folk hero to the oppressed locals. Now with their support, the alien sets its sights on the warlords' ruthless leader.
雷•费瑞尔（汤姆•克鲁斯 Tom Cruise 饰）和妻子离婚了，一儿一女都跟母亲生活——因为他的的贪玩懒散，疏忽责任，这个家庭才如此支离破碎。一场外星人入侵的灾难却让他们重新建立起亲密的的关系。 这天妻子繁忙，只好把儿女交给雷照顾。电闪雷鸣天色灰暗，一切好像有些异样。 果然，马路上赫然一个庞大的三脚飞行器掘地而起，邪恶的火星人光顾了这个本来平静的小镇。人们四处逃亡，雷也带着女儿奔走逃命，开始了生死历险。当局想尽办法对付外星人，却屡屡失败，整个世界都陷入了恐慌当中。 有了父爱的本能，平日吊儿郎当的父亲变得英勇顽强，保护儿女成了他支撑他的动力和信念
以提利昂·克莱顿（Steve Hanks 饰）为首的美国军方人员进行着一项秘密计划，名为“思绪膨胀”计划，这项计划掌握着各种操控天气的秘诀。一个小组希望利用这个计划改变世界，例如为干旱地区带来降雨。但意想不到的效果产生了，这个机器正悄然毁灭着美国的城市...
