Law & Order: Special Victims Unit - Season 9 Episode 15 Undercover Hope in the darkness.
Overview: 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.