McGee and Torres follow up on a high school student who witnessed a hit and run. Vance learns that his daughter has been arrested for shoplifting.
The murder weapon used in the death of a teenage boy gets linked to a case Voight worked on 17 years ago. The victim's father wants Area Central Homicide to look into the case.
As the team investigates the death of a seemingly innocent 15-year-old boy, they learn that he was involved in illegal activity.
Warren feels pressure from Kate to get more involved with social activities which doesn't work out as expected while Jackie tries to help Hillary with an assignment.