After narrowly escaping an historical burial floor, lengthy forgotten and buried beneath the marshes of Cape Cod, a bunch of mates emerge from the thick, marshy darkness, tattered and bloody, fortunate to be alive. They’ve already misplaced two of their mates within the marsh, presumably useless. They come upon an empty Cape Cod trip home alongside the foggy marsh and break in to take shelter. No matter was within the marsh continues to be after them and shortly after one in all them goes for assist, the remainder of the group learns that the evil within the marsh will not be the one factor that desires them useless. One thing worse, one thing extra savage, was mendacity in wait simply outdoors the marsh, in the home. What occurs subsequent is unspeakable, horror that can not be unseen. These unfortunate vacationers spend their St. Patrick’s Day trapped between two evils forcing them to battle, die, or return the way in which they got here.