在乡下宁静的小镇里，人们辛勤耕作，享受宁静而安详的每一天。这天是秋分之后的满月，镇上的人们举办了篝火晚会，准备狂欢一整夜。日落时分，年轻人逐渐聚集在此，Hank是Abe的兄弟，他桀骜不驯，带着自己火辣的女友来到这里，Abe带着朋友Carter也随后出现，Hank和Abe随着年龄的增长互相变得不信任彼此，正是这个夜晚，他们之间的关系爆发了，当矛盾冲突到达顶点，这群年轻人将要何去何从，一切还能回归往日的平静吗？

While driving through the desert with his wife Carol Marvin to a military base to send the eleventh rocket to the orbit of Earth for helping the exploration of the outer space in the Operation Sky Hook, Dr. Russell A. Marvin and Carol see a flying saucer and accidentally records a message in their tape recorder. Once in the base, Dr. Russell is informed by his father-in-law and general that the ten first satellites had mysteriously felt on Earth. When Dr. Russell decodes the message, he encounters the aliens that ask him to schedule a meeting with the leaders of Earth in Washington in 56 days with the intention to invade Earth without panicking the population. Dr. Russell develops an anti-magnetic weapon that becomes that last hope of human race against the hostile aliens.