Martian invaders are in the process of making exact doubles of an entire town and then killing the original models. The terrifying facts are discovered by a scientist working at Cape Canaveral who is trying to figure out why a recent Martian probe simply exploded after landing on the Red Planet. He has been in Florida working on the project for so long that his wife in California is about to divorce him. Wanting to save his marriage and see his family, he goes home and suddenly ends up fighting for not only his own life, but for all humanity.