owie Morrison is a nice young man who is the butt of many jokes owing to his low IQ. His sister Sheila, a paleobiologist, is called in by the local mine manager when they discover a dinosaur of sorts in a newly opened mine shaft. What no one realizes is that the creature was killed by a caterpillar-like virus that has also infected the three miners who opened the new shaft. Soon everyone in town except Howie has turned into a zombie-like creature. He realizes that the creatures only come out at night and hide in the mine during daylight hours. He hatches a plan to save everyone.

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