After a toxic spill creates an infectious outbreak, causing people to be filled with rage and turning to cannibalism, four survivors converge upon a house nestled deep in the woods. Together, they must try to survive the madness happening outside, the uncertainty and each other. As things become more grim, hope fades and supplies run low, people’s true selves begin to show. The four must try to survive the monsters outside and within.
When Andrew and his disturbed girlfriend, Lila, travel to a secluded estate for a weekend getaway, they fall into the clutches of a predatory murderer who stalks the dark forest near the house. On Halloween night, the town of Hobb's Ferry finds itself at the mercy of the Intruder, a bloodthirsty clown, whose depraved tricks push Lila to the brink of madness.