The BAU investigates a group of suspects with a pack mentality who are randomly selecting their victims in the nation's capital and murdering them for the thrill of it.
The son of a murdered basketball star receives a death threat, so Rush and Valens reopen a 1987 case involving another basketball player.
The detectives are on the scene of a homicide when Clark arrives. He was going stir crazy taking time off following his father's death.