Almost beaten to death by a gang of violent teenagers, schoolmaster Peter Mason wants nothing more than to escape the simmering violence of London, his broken marriage and the memories of his daughter's death. The perfect chance comes in the form of a position at a prestigious boarding school in the heart of the Buckinghamshire countryside. But the past is always lurking in the background. Not just his own past but that of the school and its former staff. Mason becomes obsessed with discovering what became of his predecessor. The man's mysterious disappearance remains unexplained, leaving a chilling legacy behind. Mason finds that there are strange events occurring at the school - violent and sinister events that have happened before and will, if he cannot stop them, happen again ...