Robert Weiss directed a suspense sci-fi film about an American space capsule falling into a small town on the outskirts of Mexico, leaving all the townspeople strangely dead, leaving only one old and one seriously injured. The special rescue team brought them back to the laboratory to study their illness and finally discovered the secret. The production of this film is very serious, and there are some outstanding performances in the atmosphere and image. But on the whole, it is too slow and too detailed to describe how scientists study the process of cell division.