When the body of young man is found in a tank at a wastewater treatment plant, the medical examiner identifies a tattoo that says TE, the symbol for the fraternity Tau Omega. The investigation into the murder and sodomy of this local fraternity pledge master leads the detectives to his pornographic website featuring college girls at a local bar.

When it becomes obvious that a forensics expert raped and murdered a student, the investigation focuses on a criminology professor Cragen arrested decades earlier for similar crimes, but is the professor a perpetrator or a victim?

With the encouragement of a radio host, who has a dirty mouth on him, one teenager is raped and another is imprisoned when they are thrown together by the manipulative adults in their lives whose sole motivations are celebrity and publicity for their own self-serving interests.

When the body of a seven-year-old child is found, the squad again begins to investigate convicted serial killer Lucas Biggs, believing that he molested and murdered the boy. While Biggs can detail every child he ever molested, he swears that he has no memory of this one. Further investigations show that there is another suspect, but before he can be picked up, someone picks him off.

After young Sean Hamill is stabbed in the back at the schoolyard, detectives are led to Charlie Monaghan, the older boy who had previously gotten into trouble over Hamill, but it isn't long before their attention turns to Monaghan's half-sister Emma Boyd. Hamill had been torturing the little girl for months because she had two mothers. After getting a nice deal for Emma's side, Benson and Stabler are thrown for a loop when Emma's biological grandparents accuse Zoe, who had never legally adopted Emma, of sexually molesting the little girl, and evidence seems to support their claims.

After the body of Vicky Riggs is found, Benson and Stabler delve into her private life and finally learn that in addition to being a respected lawyer, she was also a stripper. A surveillance photo leads them to Linus McKellen, her boss' husband, who was also having an affair with her. There isn't enough evidence to prove he murdered Vicky, but when Vicky's co-worker at the club, Josie Post, is also found murdered, DNA proves that McKellen's semen was found in her body, despite his disabled wife Tessa's conviction that he would never murder anyone. Suspicion turns on Tessa herself once the detectives interview the only man who seems capable of having committed the murders.