Lucy’s husband has been missing for days while she tries to pretend to those around her, including her distracted teenagers, that everything is normal. In desperation, she uses a phone app to track him—and discovers he’s with another woman. As her life falls apart, Lucy realizes nothing is as it seems. There's another woman in her husband’s life, but it’s someone she has known—and hated—for twenty years. As the story unfolds, including in the national press, her family must pull together before lives are destroyed.