A subway commuter is found castrated and bleeding profusely, leading the detectives to discover their "victim" may be the perpetrator in abducting women and forcing them to live in his dungeon for several years as his bride. As the detectives prepare to arrest their victim turned suspect, Benson arrives to find him murdered.

After a van containing two young children ends up in the river, Beck finds herself drawn to the young girl, Eden, and the investigation into a tape found in the vehicle turns up a mysterious death involving a controversial attachment therapy technique. Beck tries to do the right thing by saving Eden, only to find herself torn when it seems as though there is nothing she can do to help. The investigation into the rebirthing turns up a foster family who abuses the children in their care, but not all of the children agree that it was abuse.

Stabler finds himself drawn into a case where a young mother has committed suicide after her baby goes missing. The case leads to questions for Benson about her own family history.

Stabler seeks Kathleen's help when investigating a case involving teenage alcohol abuse.

After a woman was found raped in a garden, Benson and Stabler realize that the case goes much deeper because of the victim's mother, drugs, and the realization that a corrections officer is involved. Benson decides to go undercover at the same prison where the mother is, putting herself on the other side of the fence.

Benson and Stabler are called to investigate when a little girl goes missing. They soon find out that the mother had another daughter who disappeared some years earlier and she becomes the focus of the investigation.