A woman commits suicide for no apparent reason. A week later, her son- fifteen-year-old Mark Underhill-vanishes. His uncle, novelist Timothy Underhill, searches his hometown of Millhaven for clues that might help unravel this horrible dual mystery. He soon learns that a pedophilic murderer is on the loose in the vicinity, and that shortly before his mother's suicide, Mark had become obsessed with an abandoned house where he imagined the killer might...