Sarah lives alone in an isolated cottage in Yorkshire. Her husband has died, her children left for university. When Aiden, an old friend of her husband comes to stay, Sarah's children and best friend Sophie are unhappy with the arrangement. They feel something is off with Aiden. And when a man's voice appears in the novel, obsessively watching Sarah, they might be right. But when Aiden goes missing suddenly, the stalker still persists. Who is watching Sarah, and just how dangerous is he? A chilling and compulsive psychological thriller from Elizabeth Haynes.