Ninety-year-old Margaret Riley is content hiding from the world, finding comfort in the mystery novels that keep her company, that is, until she spots a woman who's moved into the long-empty house across the pond. Jennifer Young is also looking to hide. On the run from her old life, she and her four-year-old son Milo have moved to a quiet town where no one from her past can find her. In Jennifer, Margaret sees both a potential companion in her loneliness and a mystery to be solved. But Jennifer refuses to talk about herself, her son, his missing father, or her past. Frustrated, Margaret crosses more and more boundaries in pursuit of the truth, threatening to unravel the new life Jennifer has so painstakingly created - and reveal some secrets of her own.