Eighteenth century Cornwall. A fifteen-year-old boy is convicted of the murders of two children, and suspected of a third, but her body is never found. Local people gather to see the boy hanged, believing this to be the end of his evil. In 1980s Bristol, a troubled young man attacks his sister, but believes he was possessed by a malevolent spirit. Unable to take the guilt, he runs away. Years later, Jenna Thornleigh and her friend move...