All a group of girls wanted was to celebrate one of their mates' birthdays in an abandoned Dublin warehouse. But as the party swings out of control things begin to quickly go wrong as they find themselves terrorized by a group of violent vagrants. But soon they must cope with a far, far worse threat as they come under frightening attack by a supernatural horror that has no compunction between good or evil. Escape soon proves hopeless and they are trapped in the labyrinthine building. The only question left, is there any way out?