The horror begins inconspicuously. Footsteps in an empty room. A voice in the dark. Lingering bad dreams. Then, Aoife Auchterlonie begins to change before her mother’s eyes; becoming angry and aggressive, attacking those close to her, and running away from home. Is Aoife turning into someone else? Or is she possessed by something evil?
Father David Maguire, a disgraced priest, has been exiled to the tiny island of Inis Gealach to live out the rest of his life. Aoife and her mother come to him for help. They want Father Maguire to perform the rite of exorcism. He doesn’t want to do it, but finds himself left with no choice after witnessing a manifestation of the Devil himself. Will Father Maguire be able to save Aoife’s eternal soul? Or will this man of God be undone by the demonic forces at work on Inis Gealach?