Tim Underhill's sister-in-law takes her own life, and shortly afterwards his nephew goes missing. Yiug boys are disappearing in the locality and it seems almost certain that Mark has met with very foul play. But in the weeks running up to his mother's death and his disappearance, Mark had developed a strange obsession with a deserted house in his neighbourhood. Tim tries to follow events as they unfolded and understand the Mark's fascination with a truly terrible and evil place.