In the final hour of the crossover event with Chicago Fire, Intelligence hunts down the culprit behind the hospital bombing while Burgess awaits news of her niece's survival.
After a brutal, eight-million-dollar robbery, Intelligence discovers someone is killing off everyone involved; a reconnection for Halstead leads to a surprise; Platt asks Ruzek for an awkward favor.
Halstead must prove his own innocence in the Rodiger murder when Voight strips him of his badge; a dismembered body leads Intelligence on a complicated manhunt.