The film begins with a farmer named Billy Hoss (Rex Linn) and his wife Ethel (Dee Wallace) waking up in the middle of the night to unusual noises. They and their dog Sparky go outside to investigate, where they find a horse lying dead, violently ripped open. Their dog runs into the dark, and is attacked (and presumably killed off-screen), causing Billy and Ethel to run back in the house where they see a mysterious giant figure behind their home. Once the creature is gone, they come out again and find large footprints on the ground.