Benson and Fin question the girl they found in the house, while Cosgrove and Shaw pressure the woman. They all raid Sirenko's house where Stabler, Benson, and Cosgrove all find makings of a bomb in a secret room. They try contending with the FBI and the Deputy Mayor, who don't budge because they don't want to evacuate 9 million people from the city. Stabler has his CI get into contact with Sirenko to find out about the bomb but it was a bust which leads into a shootout and Stabler's CI dead. Stabler questions Sirenko's bodyguard, but he is not talking. Stabler also gets things heated up with the Deputy Mayor after he talks about his CI. Jet finds out about a house that is being rented out. The guy works for a hotel where they find out is the actual location of the bomb. The police and the FBI start evacuating the building. Shaw finds the bomb, but Dixon won't let him defuse it. Cosgrove finds Sirenko, but gets away once the bomb detonates. Rollins finds Sirenko who takes hostages inside a clothing store. Cosgrove, Shaw, and Stabler are able to pursue Sirenko in an alleyaway where he is arrested.

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This episode continues a crossover event that begins on the season three premiere of Law & Order: Organized Crime and concludes on the season twenty-two premiere of Law & Order.

A group of teens terrorizing tourists has the SVU squad working overtime; McGrath teams them up with the Bronx gang unit to track down a crucial lead.

Benson tries to help a pop star in a volatile relationship; Rollins struggles with taking the stress of work home with her; Fin teaches a rookie a lesson in respecting fellow officers.

A home invasion and kidnapping leads the SVU to a shocking discovery; Muncy tries to fit in with the squad.

A young man asks the team for help when he suspects his boss is preying on his sister; Velasco tries to convince a reluctant witness to testify in court.

Rollins investigates an assault by a masked man at an underground party; Benson uncovers a suspect who may be valuable as a witness.

When the case against a popular sports star falls through, Benson digs into the suspect's past to uncover additional victims; Velasco is disappointed when he meets one of his heroes.

• First appearance as a series regular of Molly Burnett as Detective Grace Muncy

The SVU hunts for a violent suspect who killed a detective's child; Rollins ponders a potential opportunity.

Carisi and Rollins work together on an important arraignment; Benson tries to make Noah's Christmas wish come true when a case falls in her lap.

• Final appearance of Kelli Giddish (Detective Amanda Rollins) as she departed the series after this episode.

When Benson becomes the target of a ruthless gang leader, Captain Duarte takes the case; Fin works with the Bronx SVU to help clear their case backlog; Lieutenant Dixon offers to translate when a deaf student is raped.

While Benson tries to help the gang member who attacked her, Duarte reveals a shocking piece of evidence in the case; Fin is tasked with hiring new detectives for the Bronx SVU.

As Benson and Carisi put a vengeful crime boss on trial, Tutuola tries to help a woman who was drugged and left for dead. Velasco takes drastic action to get information from a witness.

A car accident leads the detectives on a search for an ambulance driver assaulting his charges; Tutuola gives Detective Bruno a tour of Manhattan SVU.

A recently-released convict goes looking for his arresting officer, Tutuola; Carisi tries to get an arrest warrant without a positive suspect ID. Fin talks about John Munch who moved back to Baltimore. Also he is married again.

A man with dementia confesses to murder; Benson and Carisi believe there’s more to the case; When rumors swirl across the squad room, Fin presses Velasco for the truth.

This episode was dedicated to the memory of Richard Belzer.

An internet dating site becomes the source of terror for a young widow; Muncy struggles with Velasco’s absence

The search for the suspect who drugs woman’s drinks in crowded bars leads the SVU to Muncy’s brother; Churlish makes a risky move to impress Benson.

A construction tycoon interferes with an SVU investigation into her family; Carisi struggles to get an indictment when the complainant backs down.

Carisi must tread carefully when Maxwell’s husband becomes a person of interest in an SVU investigation; Benson sends Velasco to take an old friend into custody.

Benson tries to help a student after she is assaulted during a field trip; Fin suspects a witness in the case may not be telling the whole truth.

Kate Wallace a tourist from Columbus Ohio is raped in her hotel room by a perp who addresses her by name and taking a selfie. Soon after Mark Reed is found in the wilderness stuck for weeks in a hole with empty bags of licorice all around, reminding Muncy of the control technique Elias Olsen once used. Reed later dies in the hospital. Muncy and Churlish question Reed's wife Shelly who later identifies the body. Soon another rape is reported in the West Village at a tea house again calling the victim Evie Quinn, by name and taking a selfie, though this time she was watched by her stalker Billy Vitale. Vitale is later confronted by Fin and Velasco but denies knowledge. Special Victims Division later reports three similar previous assaults with the same patterns in the past six months. Reed's wife reports that he went missing after going into the city and making a charge at a bakery and a baker there identifies Elias Olsen as someone Reed was speaking too. At Staten Island Benson and Carisi speak with Darlne Quinlan a previous victim who called off an engagement with her fiancé Greg before the wedding a week before. Benson and Carisi speak with Greg who denies knowledge but not obvious bitter feelings leading Benson to believe that the rapist was hired. Fin and Velasco question Maria Varga, a Nanny who claimed that Brooklyn Special Victims Unit matched DNA to a convict from Green Haven Junior Suarez, who is officially still imprisoned. They go question Derek Scully her last boss whom she had once hooked up with but quit the next day but again denies knowledge. Benson and Carisi go to Rose Bergman who was raped in her office after filing divorce from her husband Harvey of 25 years. Muncy and Churlish track Olsen to a church and arrest him after some coercing. With no concrete evidence linking the rapes Elliot Stabler and the Organized Crime Control Bureau are called in to cooperate with the Special Victims Unit.

This is the first episode in a four-episode crossover with Law & Order: Organized Crime. The next episode is in Law & Order: Organized Crime, Season 3, Episode 21 "Shadowërk"

A website called Shadowërk is behind a large revenge for hire scheme that reaches globally. An Agent McCrary investigates an IP Address in Dublin Ohio which is the location of an office called Escrow. Chief McGrath shows up to put the pressure on Benson, and the Unit to arrest the perps in New York risking getting on Shadowërk's radar. Kate Wallice is attacked again while taking a walk. She later gives DNA evidence to Fin and Bruno that she spit into a hoodie. Slootmaeker's works on a virus to slow down their progress on the dark web in hopes they replace their servers. Kate's new attacker later goes after a 14-year-old boy Manny Lopez. Shadowërk later goes down in a possible reply to Slootmaeker's virus leaving their leader in the wind. The serial rapist strikes again in the Subway on Yves Netty a 22-year-old male college student. Netty did not get raped however but stabbed the attacker in the abdomen. All the hospitals in the area are monitored, and he's spotted in an urgent care and identified as Randy Gordon and arrested. Gordon confesses to seven other attacks in the past year. At Escrow an IT person rushes to investigate the servers. Running the plates on the unmarked car identifies Jacob Bettencourt a college student from Kenyon College. He attempts to steal the server before McCrary arrests him. Benson and Stabler are called in to Ohio, when Shadowërk comes back online faster, and puts out a hit for Benson and Stabler with a $50,000 bounty.

This episode continues from Law & Order: Organized Crime, Season 3, Episode 21 "Shadowërk", and is concluded by Law & Order: Organized Crime, Season 3, Episode 22 "With Many Names".

• Final appearance of Molly Burnett as Detective Grace Muncy.