Mary and her son Fergal live on the run, hiding from someone or something. When they move to yet another new place, Fergal finds himself caught between the affections of his beautiful neighbor and his fiercely protective mother. Their hunter is Cathal, a dangerous and terrifying man, who uses a dark form of magic to track them down and plans to kill them. In order to protect her son, Mary uses the same ancient form of magic. When local residents are brutally murdered by an unknown life force, the sense of fear escalates. And it is unclear whether or not Cathal is the beast responsible for the killings or if it is the beast that he is trying to destroy.