Astronaut Steve West is exposed to unknown type of radiation after returning from a mission from Saturn. While in the hospital his health becomes worse and his flesh starts to melt from his body. He escapes and starts to kill people to keep him alive consuming their flesh. The local authorities want to kill him and stop his rampage but his friend, Dr. Ted Nelson, wants to try and save him.
The special makeup effects were done by legendary artist Rick Baker.
The film also appeared on the show Mystery Science Theater 3000, episode 704-