When a flying saucer reportedly lands in rural Iowa, The Old Man (Donald Sutherland) who runs a secret branch of the CIA must investigate. Accompanied by fellow CIA agents Sam and Jarvis, as well as Dr. Mary Sefton, a NASA specialist in alien biology, they find that the reports of aliens are true. Now, they must nab the aliens before these "friends" from outer space use their mind-control powers to take over the planet.