Raised by loving adoptive parents, San Francisco private investigator Wyatt Hunt never had an interest in finding his birth family--until he gets a chilling text message from an unknown number: "How did ur mother die?" The answer is murder, and urged on by curiosity and the mysterious texter, Hunt takes on a case he never knew existed, one that has lain unsolved for decades. Hunt's birth father, twice tried but never convicted of the murder, is in hiding; Evie, his mother's drug-addicted religious fanatic of a friend, is untraceable. And who is the texter, and how are they connected to Hunt? The texter, who insists the killer is out there, refuses to be identified. The cat-and-mouse game leads Hunt across the country and eventually to places far more exotic-and far more dangerous. As the chase escalates, so does the threat, for the killer has a secret that can only be trusted to the grave.