After Danielle Masoner dies in Central Park, Stabler follows the leads to a homeless man who turns out to be a better witness than he thought. Paired up again with Benson, Stabler investigates her death, but it keeps bringing up memories of Dani Beck for him. During the course of the investigation, Benson and Stabler learn that Danielle's husband was sleeping with a friend of theirs, leading the squad to suspect first him, but their suspicion soon turns to the husband of the other woman.

Stabler ends out being out of commission after a perpetrator high on PCP throws him through a window at the station, so Benson teams up with Munch and Tutuola to investigate a mysterious packet of photos. The photographs lead them to both a suspected child pornographer and a junkie burgler, but after Benson takes ill during the investigation, the team realises that there is more than child pornography at stake as their investigation soon reveals that Seth Millstead wasn't into little boys at all, but had been using the tenants of the apartment building in an experiment for a new pesticide.

Detectives are troubled to learn that someone has taken an online game too far when a girl goes missing.

Novak confronts ghosts from her past while handling the trial of a schizophrenic serial rapist, who seriously injured Stabler.

Teenage boy Eric Byers admits himself into the squad room, and warns the team about an unnatural desire towards his younger stepbrother, Cory Kelly. Detective Elliot Stabler and Olivia Benson’s suspicions arise, and Eric admits to also looking at a website to try to curb his pedophilic urge. With no crime committed, the detectives decide to investigate this “self-help” website for pedophiles leading them to it’s creator, Jake Berlin. Eric’s rage induced stepfather is also questioned, and shortly after Eric is found missing. The detectives must race to place the clues together to find and stop Eric before any crime is committed.

Soon after a young girl, Laine McAlister, is raped in her apartment building's stairwell, Detectives Olivia Benson and Eliot Stabler meet Laine in the hospital and find her extremely shaken with a large cut on her hand. After an unpleasant exchange with a man she claims is her boyfriend, the detectives become suspicious that she may have fabricated her rape to get attention. Their suspicions grow when she waits to reveal that there was an eyewitness. As the gravity of the situation intensifies, Benson and Stabler find themselves in a race to track down the witness and get a testimony before it is too late.

Two men have been branded and sodomised by someone. Is there a connection between these men, and what nut case is on the loose?

Debbie Shields comes home to find her partner Ann Jackson being raped by a man wearing a haunting mask. Shields contacts Ann's father to notify him of her critical condition. As detectives Benson and Stabler interrogate Ann's father, Captain Jackson, his sordid past is revealed filled with sexual and alcohol addiction. Jackson's new role as a sex therapist is hindering the detectives from getting the information they need to solve the case and if Jackson won't comply, the detectives are going to have to get creative.

When an abandoned baby is found on playground, Detectives Benson and Stabler go in search of the child’s caregiver. Upon meeting the nanny and her boyfriend, Ken Turner, they soon realize that he is also engaged to the baby’s adoptive mother, Dede Aston. As the detectives dig deeper into Turner’s malevolent past, they realize that the law may be on his side.