A 9 year old child's asphyxiated body is found in a suitcase on a bus, with evidence of having been in the Everglades. The coroner found she had had a quality nose job, and been raped. Benson & Stabler find she was a regular beauty pageant contestant. A suspect's computer is found with a juvenile kidnap, rape and murder how-to, apparently perfectly legal, because created using legal age models whose images were manipulated by software to make them look much younger.
A quadruple homicide with sexual overtones is just the start of an intense rampage of killings that brings a homicide detective into the mix. As the entire squad races against time to prevent further victims, the evidence leads Tutuola and Deuthorn to a building superintendent, his two sons, and a cross to bear.