Father Damien Karras: 'Where is Regan'. Regan MacNeil: 'In here. With us'. The terror begins unobtrusively. Noises in Regan's room, an odd smell, the displacement of furniture, an icy chill. Easy explanations are offered. Then frightening changes start in the eleven-year-old girl. Is it possible that a demonic force is present in the child?