The only witness when a single mother mysteriously vanishes? Her three-year-old daughter. FBI agent Sam Pierce needs to question little Sarah. Yet child psychologist Jocelyn Gold will barely let him near the girl. Or herself. The tragic conclusion to a kidnapping case broke Sam and Jocelyn apart years before, and their hearts still haven't healed. But for the child's sake—and her mother's—they must join forces to uncover just what Sarah saw.