Philip is convinced he's fallen prey to a malevolent entity which, following his sister's death, forces him to live imprisoned in his home, surrounded by Catholic icons to ward off increasing paranormal incidents. Comforted by the spiritual guidance of local priest, Father Andrew, Philip brings his lover, Catherine, to stay, but she soon falls victim to a demonic possession, resulting in a failed attempt at exorcism. Alone again, Philip finds himself drawn by the charms of his new neighbour, Sonia, but nothing, not even salvation, is really as it seems.