Titled "Swan Thong," the season finale features a 1970s London setting and a heartbreaking sacrifice by Zari 1.0 to save her brother. Chicago PD season 5, episode 15 preview: Vigilante justice
Burgess witnesses an informant receiving a gun but hesitates to report it, secretly wanting the vigilante to "take the shot".
The team hunts for a woman identified as Veronica, who is killing rapists. This mirrors the team's own history of taking the law into their own hands, creating a "pot calling the kettle black" dynamic.
After the vigilante kills her target, Voight comforts Burgess and suggests Chicago is better off without the criminal, leading some fans to believe he may have even helped facilitate the vigilante's actions.