While administering an important drug test on a new anti-depressant to help addictive teenagers stay clean, a prominent doctor is murdered in his office. With the billion-dollar drug company refusing to cooperate and a growing list of suspects, Brenda and the Priority Homicide Division have their hands full. When Brenda disagrees with a member of her team over how to run the investigation, she finds her past coming back to haunt her, but as the allegations of her prior misconduct surface in the local press, Brenda discovers a suspect who has a dirty little secret of his own.