The Fletchers' beautiful new house is everything they dreamed it would be. Built between two churches in Heptonclough, a small village on the moors that time forgot, it ought to be paradise for this young family of five, but they barely have a chance to settle in before they find that they're anything but welcome. Someone seems to be trying to drive them away--at first with silly pranks but then with threats that become increasingly dangerous, especially to the oldest child, ten-year-old Tom Fletcher, who begins to believe that someone is always watching him.
The adults in Tom's life are trying to help, including his parents; the vicar next door, younger and more dashing than you'd expect a vicar to be; and a therapist, Evi Oliver, who believes him more than she wants to. But there are other clues that something isn't quite right in Heptonclough, including the mysterious accidental deaths of three toddlers over the last ten years. It is not until Tom's siblings, two-year-old Milly and five-year-old Joe Fletcher, go missing in turn that the little village's evil secret turns the Fletchers' dreams into a nightmare.