After Ann Nolan, a California beat cop, adopts the daughter of a notorious drug dealer, the ruthless father vows to take back his only child. In response, Ann flees across the country, changes her name, and starts a new life as an investigator for the Mercy Street Foundation, the billionaire-endowed organization dedicated to finding missing persons. As Emme Caldwell, she takes the lead on the Foundation's first case: Nineteen-year-old Belinda Hudson...

On a balmy spring evening, four high school seniors–three boys and a girl–enter a park in the small Pennsylvania city of Conroy. The next morning, two of the boys are found shot to death, and the girl and the third boy are gone. After three weeks with no leads and no sign of either of the two missing teenagers, the chief of police begins to wonder if they too were victims. But with no other suspects, the authorities conclude that one of these...