Deadly space organism from a Mars probe is let loose while being transported by rail cross-county, resulting in a train station and its occupants being quarantined. Waiting for help, they must stay awake. . .or die.

Cheap regional take on The Andromeda Strain is too talky, but has a downbeat nastiness that makes up for its deficits. A dyspeptic-looking Ralph Meeker may be the 'star,' but Buck Flower is easily the best thing about the film, drunkenly blathering on like a modern day Gabby Hayes, and in the process giving the only nuanced performance in the cast.