On the 10th anniversary of her daughter Autumn's abduction, Francine receives an anonymous note containing just five words: I KNOW WHERE SHE IS. When a young woman appears claiming to have sent a letter that says she knows the location of Francine's missing daughter, Autumn, Francine wants to dismiss it as a cruel, twisted joke. But the stranger knows things that only Autumn would know. It soon becomes clear that Francine must go to dark places in order to learn the truth about her child’s kidnapping. She will discover that danger comes from unexpected sources. She will do things she never imagined herself capable of. But will Francine get her daughter back—or is it too late? A heart-stopping, gripping thriller for fans of C. L. Taylor, Karin Slaughter, and Linwood Barclay.