The film follows John Crenshaw as he accompanies his girlfriend and her students on a weekend nature-photography expedition deep into the woods. What should be aneducational and fun-filled weekend turns into horror as the group is besieged by an unspeakable evil - a horde of hideously disfigured| mutated humans with aninsatiable taste for blood. As things go from bad to worse| Crenshaw becomes their only hope if they are going to get out alive.