Befriending a stranger in an accompanying seat when their commuter train stalls, Selena confesses a personal grievance before her life is upended by her nanny's disappearance and growing fractures in her marriage.

A man searching for the mother who disappeared decades earlier, a high-strung teenager, a psychic who predicts a man's death, and a disgraced former chief of police find their lives converging in ways that invoke formidable personal costs.

Fresh from a tour promoting her last case, reclusive true crime writer Lydia Strong receives an anonymous cry for help, begging her to find and protect Tatiana Quinn, "and all the other girls in need of rescue." Maybe the plea strikes close to her heart; maybe her investigator's intuition starts buzzing. She takes it on.
But this simple case of a missing teenager soon becomes much more. Someone wants Lydia to drop the case, someone powerful, someone...