Atwater faces repercussions for exposing police misconduct, heightening his distrust and fear of cops. He installs a home security system, signaling his anxiety. The episode centers on the death of Isla Sherman, found with Billy Braddem, an estranged son of an alderman, who's high and holding a knife. Despite pressure, Voight hesitates to charge Billy, suspecting another culprit. Meanwhile, Kevin grapples with isolation from his colleagues and considers quitting the force amid systemic challenges. The investigation leads to drug connections, culminating in the capture of Tim Rollins, linked to Isla's murder.