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。Ray Ferrier (Cruise) is a divorced dockworker and less-than-perfect father. When his ex-wife and her new husband drop off his teenage son Robbie and young daughter Rachel for a rare weekend visit, a strange and powerful lightning storm suddenly touches down. What follows is the extraordinary battle for the future of humankind through the eyes of one American family fighting to survive it in this contemporary retelling of H.G. Wells seminal classic sci-fi thriller.