Dr. Russell Marvin heads up Operation Skyhook, which is tasked with sending rockets into the upper atmosphere to probe suitability for future space flights. Unfortunately, all the rockets somehow disappear. While investigating this strange occurrence, Russell and his new wife Carol are abducted by a flying saucer. The aliens demand to meet with certain people in order to negotiate... but it is a trick, and the Martains only want to kill them. The invasion has begun and if Russell and Carol can't find a way to stop these creatures by getting past their defenses, it may be the end of the human race.—Christopher Miller