This made for TV movie is based on a 1954 short story, by Tom Godwin, in Astounding Magazine. It addresses the difficult moral and ethical issue of what to do when an innocent life must be sacrificed in order to save other lives. Like the story, the movie doesn't pull its punches and come up with a happy ending.
This isn't Star Wars or Alien, so don't expect gun battles or monsters. The drama here is the interaction between two people struggling with emotional, moral and ethical issues.