Isabel and Oliver practice their Krav Maga skills in a simulated attack. Suddenly, they hear a scream from down the hall. They rush to check on Isabel's roommate, Catherine. She is huddled on her bed, crying, and her torn panties are on the floor. Isabel tells Oliver to call the police and tell them to meet them at the hospital. At the hospital, the nurse finishes bagging evidence in a rape kit as Stabler and Fin enter to interview Catherine. Catherine, a high school teacher, tells how she went to bed early and when she woke up, the man was already on top of her with his hand over her mouth. Isabel keeps interrupting to add details, such as the fact that the attacker got in through the fire escape. Fin ushers Isabel outside the room to take her statement. Stabler thinks Catherine knows who attacked her. She says it was Kevin, Isabel's older brother.