The waitress is getting married, Dee is jealous that she's beating her to the altar, so she tries to derail the wedding.
An overweight, reclusive coed dies in a fraternity house fire, and Lilly discovers a photo of her being held down and forced to drink.
Evidence from the case of a young woman who was shot to death confirms the Chicago P.D. has a serial killer on its hands; Voight welcomes Kenny Rixton to the team when Ruzek takes another assignment.
When the crushed body of a young teen who ran away from a treatment center for troubled girls is found in an abandoned building, Voight sends Halstead under cover as a guard to investigate the center from the inside.
Kevin takes the twins to the cabin in hopes of proving himself as a father.
