Benson is called in after a young woman shows up at the hospital, raped and beaten with her head shaved. Haley Kerns refuses to submit to a rape kit, but Benson steals her underwear before leaving the apartment and gives it to Warner to check out. When Benson returns to her apartment she encounters Star Morrison, who admits that Haley is a federal informant working with them on eco-terrorism. After Stabler is wounded while out on a search with Morrison, Benson and she work to get information from Haley before the eco-terrorists can strike.

Stabler and Tutuola pair up to investigate when two teens go missing while their school is on a field trip to a local museum. Their investigation soon turns up evidence that the disappearance was staged to help Janey, who suffers from Turner's Syndrome, be with her older boyfriend, a man with a prediliction for young girls, and to help the boy, Connor, make good on a gambling debt. Stabler experiences a rift with his daughter, Kathleen, who is upset over the way that he has handled her relationship with a young man named Kevin.

When the paternity of a missing young boy is placed into question, Stabler wonders if he really is the father of Kathy's child. Later, Stabler faces the possibility of losing not only his partner but also Kathy and the baby when she and Benson are in an accident.