After Philip and Valerie Messick are attacked in their home, Green and Fontana follow the trail to a small-time thug named Jay Fleckner. After Valerie's testimony unintentionally helps free Fleckner, he is found dead, and detectives soon realize that Bob Cerullo, a family friend of Valerie and her late husband, was the triggerman. Unfortunately, when McCoy attempts to prosecute Cerullo, a retired cop, he threatens to claim that he deliberately planted evidence in his past cases in an attempt to get McCoy to drop all the charges.

Detectives Fontana and Green investigate the strangling of a promising Hispanic student at a private magnet school. The men soon learn the victim was selling test answers and writing term papers for more privileged students, including their prime suspect, Greg Loomis (Jaime McAdams), a trouble-prone senior who would kill just to graduate. After Loomis' arrest, Jack McCoy spurns any deal with his high-powered attorney Rebecca Shane (Kathleen Turner) but has to overcome her vigorous defense that her client himself was a victim of medication side effects.