John Crenshaw has given up his life as leader of his Navy SEAL team to settle down and marry his girlfriend Selina. He accompanies Selina and her students on a weekend nature-photography expedition deep into the Oregon woods. What starts out as an educational and fun-filled weekend turns into horror as the group is besieged by an unspeakable evil - a horde of hideously disfigured, mutated humans with an insatiable taste for blood. The horde savagely attacks the camp. John fights off some and is left for dead as the creatures led by the sadistic Atkinson take Selina and the group back to their camp. Battered and enraged Crenshaw must once again embrace the life he left behind to track down and kill the horde. He uses all of his special forces training to try to save the group. With unrelenting danger around every corner he must deal with the savage mutants and human deceit. As things go from bad to worse, Crenshaw becomes their only hope if they are going to get out alive.