In an underground prison an inmate escapes during a riot. One year later, a group of friends set out to locate an old hermit shack. They're worst nightmares are revealed when they spawn an evil darkness within the escaped prisoner.

The film is about a small group of friends that are enjoying a party, only to have it crashed by uninvited guests. After barely surviving the werewolf attack, they learn that it has killed most of the people in their town. Now, surrounded by a town turned into werewolves, they face a difficult dilemma. Can they kill the innocent victims of the wolves, now werewolves themselves, to survive?