When a Sumatran rat-monkey bites Lionel Cosgrove's mother, she's transformed into a zombie and begins killing (and transforming) the entire town while Lionel races to keep things under control.

Two hillbillies are suspected of being killers by a group of paranoid college kids camping near the duo's West Virginian cabin. As the body count climbs, so does the fear and confusion as the college kids try to seek revenge against the pair.