A group of wayward astronauts returning from a long mission to Ganymede crash land on a planet very much like earth. The problem is that the mysterious inhabitants are murderous lunatics out to kill every one of them... or so it seems.

Three astronauts crash land on an Earth-like planet after returning from a 7-year long expedition to Ganymede. The planet however is populated by murderous psychopaths who kill two of the astronauts right away. The third, Roger Corman, flees to the alien countryside where he decides to begin a violent quest to find out the truth behind his mission.—Mike Martinez <[email protected]>