For months, gruesome murders have gone unexplained near a rural English tavern in the woods. The deaths have been primal, and on the eve of the latest corpse discovery, a stranger enters town. Desperate to earn the trust of the patrons that same evening, he insists that he knows what beast has tortured the small community, and he knows how to stop it before it kills again. Not everyone is convinced, and when another person goes missing, unlikely alliances are forged to end the nightmare under the full moon.