A 17-year-old unsolved investigation into the rape of a teacher on an elementary school campus has hit a dead end. Casey and Alicia re-open the case files, and they uncover new leads that hopefully can put the man responsible behind bars.

Casey and Alicia travel to Clearfield, Utah to investigate a serial rapist. Bringing together an unprecedented multi-jurisdictional task force, they develop a terrifying profile of a merciless criminal and uncover new evidence.