影片讲述一群外星生物和一个迷失太空20年的宇航员一起回到地球的故事。宇航员厄尔·简森的宇宙飞船被人破坏导致他差点丧命，幸遇外星人获救。20年后，简森返回地球找暗害他的人报仇，随他而来的还有一帮变种外星人。谁知他大仇未报身先死，久怨未消又添新恨，致命而可爱的外星期三帮助简森的女儿为父报仇，显示他们强大的力量，即使世界上最强大的军队也不能阻止他们完成任务。

Charlie is an adorably awkward 20-year-old freshman who is attending college in New York City. A hopeless romantic, he dreams of being kissed while standing on the rainsoaked streets of the Big Apple, a soundtrack of swelling strings playing in the background. (Think Audrey Hepburn in Breakfast at Tiffany's.)
Love may be a many splendoured thing, but Charlie is looking in all the wrong places, and the men in his life offer little more than heartache and disappointment. With every romantic failure, Charlie becomes increasingly disillusioned, fearing he will never find his happy Hollywood ending. - See more at: