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.

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.