Ex-Navy SEAL John Crenshaw accompanies his girlfriend Selina and her students on a weekend nature-photography trip deep into the Oregon woods with plans of proposing. What starts out as an educational and fun-filled weekend turns into horror as the group is besieged by a horde of hideously disfigured, mutated humans with an insatiable taste for blood. The horde savagely attacks the camp leaving John for dead. Battered and enraged Crenshaw must once again rely on his special forces training to track down and kill the horde and save the woman he loves. With unrelenting danger around every corner Crenshaw must deal with the savage mutants and human deceit. As things go from bad to worse, Crenshaw becomes their only hope to get out alive.