An accomplished cellist is raped in her own apartment and the detectives are lead to a stalker who uses surveillance equipment and has been watching her every move.

The brutal rape, and subsequent death, of a female motorist turns out to be an undercover FBI informant acting as a cyber vigilante for catching online pedophiles to capture the predator trafficking internet porn. The detectives find the victim's husband murdered and follow the trail of evidence for the latest victim she had been tracking, which ​turns into an international case of teenage prostitution, with ties to the Czech Republic.

A quadruple homicide with sexual overtones is just the start of an intense rampage of a serial killer that brings a homicide detective into the mix. As the entire squad races against time to prevent further victims, the evidence uncovers a horrible situation of incest and abuse.

A missing teenager found beaten and tied up in a college dormitory under construction claims that she was raped by three students, but as the investigation proceeds and information obtained by the police and the press causes her story to unravel quickly, the girl recants. Since Benson remains convinced that a rape did occur, the focus of the investigation shifts to the girl's overly-protective stepfather who has resisted the investigation from its onset.

Twenty years after being convicted of the rape of a teenage girl, Ray Schenkel is released, much to the dismay of retired detective William Dorsey. When a teenage girl is raped on the route Schenkel would have taken home, Stabler goes undercover as a recently paroled sex offender so that he can get into the same therapy group as Schenkel, and the same halfway house. Cragen worries that Stabler may be getting in over his head.