Professor David Ullman is a world authority on demonic literature. So when offered a luxury trip to Venice to consult on a 'phenomenon' he accepts, taking his daughter, Tess, with him. But in Venice, things take a sinister, terrifying turn when a man speaks in the voice of David's dead father, repeating the last words he ever spoke to his son. Then Tess disappears before his eyes. Yet as she falls into the waters of the Grand Canal, she pleads with her father: 'Find me...'