Piers Morgan enters Florida’s maximum security Blackwater River Correctional Facility to confront Mark Riebe, a convicted killer who has since confessed multiple times to the abduction and murder of thirteen women along Florida’s Gulf Coast.

At Missouri’s Crossroads Correctional Facility, Piers Morgan comes face to face with Lorenzo Gilyard—the Kansas City Strangler, and sets out to discover what drove this soft-spoken, seemingly ordinary man to kill multiple times over seventeen years.