Antonio and his sister Gabriela go to the office of Elliot Gish, the man they believe started the fire that killed Shay. Intelligence along with patrol officers Burgess and Roman put pressure on Gish to try and make him confess. Lindsay approaches Voight about returning to Intelligence when she realizes that the task force isn't what she thought it would be. At the same time Desk Sgt. Platt is acting strange and has everyone curious as to why she's being overly cheery, friendly and nice.

With her recent decision to stay on the beat, Burgess begins to feel a little regret. While at a convenience store she sees some suspicious activity and pursues it without calling in for backup. Roman warns against it, but it's too late, they chase the suspect (Chang) into a warehouse and confiscates their guns and radios. They are trapped with no means to communicate out for support. Meanwhile, it's a slow day in intelligence and they are spending the day receiving taser certification.