While D.D. Warren investigates a pregnant woman's suspicious role in the murders of her father and husband, Flora Dane draws on her own haunted past to identify an unsettling link to one of the victims.

Frankie Elkin, who readers first met in Before She Disappeared, learns of a young man who has gone missing in a national forest. Law enforcement has abandoned the search but a crew of people led by the young man's father are still looking. Sensing a father’s desperation, Frankie agrees to help—but soon sees that a missing person isn’t all that’s wrong here. And when more people start to vanish, Frankie realizes she’s up against something...

Seriously injured after stumbling into a crime scene she cannot remember, Boston Detective D. D. Warren learns about a second murder with the same characteristics only to discover that she is being personally targeted by the killer.