A Hudson University co-ed dependent on financial aid is found murdered with an unexplained influx of cash. Her wealthy roommate is found with one of her rings, making her a suspect as the two were not friends. Benson, Fin, and Stabler have several theories about her murderer and their motive and investigate the various suspects; the roommate, her childhood friend, and someone connected to a heavily trafficked website where the victim was selling term papers for cash.
A band of teenage siblings attack and sodomize a teenage girl, who is a gifted piano student at a prestigious high school in Harlem. When Warner identifies the attackers as overweight, Detective Stabler and his new partner, Detective Lucius Blaine, track down the siblings -- who claim they attacked the victim to avenge an attack on their morbidly obese brother.
In seventh season finale, rock star Derek Lord goes on a national talk show and lectures about the abuse of psychiatric drugs. Meanwhile, an unstable young woman loses her virginity, goes off her prescribed medication, gets behind the wheel of a car, and mows down 10 people. As these events are played out in a highly charged way, the argument about prescribed "meds" is challenged.
The detectives investigate the disappearance of a 17-year-old girl with Turner's Syndrome, a genetic disorder that contributed to her being teased and bullied at her prep school. Meanwhile, Stabler meets his new partner, former Warrant Officer, Detective Dani Beck.
The environmental group Olivia is infiltrating for the FBI is accused of murdering the CEO of a pharmaceutical company. But when she discovers that the crime may be sexual in nature, she conducts her own independent investigation.
A fourteen year old girl who was brutally beaten, raped, and killed shares the same dog paw tattoo as two other young female homicide victims. Despite warnings from Stabler, Dani becomes overly involved in the case.