Last Humans Are On Spaceship To A New Planet But Some Humans Have Evolved Into Something Horrible

Astronauts Payton and Bower awake in a hypersleep chamber with no memory of who they are or what their mission might be. While Payton stays behind to monitor the radio transmitter, Bower ventures out of the chamber into the seemingly abandoned spaceship. The men quickly realize that they are not alone and that the fate of mankind hinges on what they do next.