On Christmas Eve at a campsite deep in the woods, an ugly sweater party is in full swing. Best friends Cliff and Jody arrive expecting some mistletoe action from the sexy twins who invited them, but soon realize that they are at a Bible camp. To make matters worse, Cliff is wearing a sweater possessed by the ghost of notorious serial killer Declan Rains.
While the evil sweater slowly possesses Cliff, Jody also realizes that the party guests aren't as innocent as they first seem. In fact, every camper holds a dark secret that infuses the party with dangerous sexual tension. Just when the pressure between campers reaches a fever pitch, Cliff falls victim to the bloodthirsty rage of the diabolical sweater and a new nightmare begins.