A woman kills herself for no apparent reason. A week later, her teenage son vanishes. To horror novelist Timothy Underhill, the boy's uncle, Mark's inexplicable absence feels like a second death, and he searches his hometown for possible clues. Though a madman known as the Sherman Park Killer has been haunting the neighborhood, Underhill believes that Mark's obsession with a local abandoned house is at the root of his disappearance. He fears that in investigating the house's unspeakable history, Mark stumbled across its last and greatest secret: a ghostly lost girl, who may have coaxed the needy, suggestible boy into her mysterious domain.