The 1964 murder of 9-year-old Marise Chiverella leaves the devout town of Hazelton, PA, in fear. An intense manhunt yields numerous suspects but no killer. Five decades pass before a student moonlighting as a genetic genealogist reignites the case.

When the body of a woman turns up in a field in Huntington Beach, CA, in 1968, police simultaneously seek a killer and the identity of the victim herself. It takes 52 years for detectives to solve this dual mystery and expose a vicious predator.