Severide is accused of a hit-and-run accident, which later turns into a vehicular homicide when one of the victims, a child, dies from her injuries.

Intelligence investigates in the wake of the warehouse fire that left Olinsky's daughter Lexi in critical condition.

While investigating, Lindsay becomes involved in another in-progress robbery and a split second decision has her fatally shooting one of the perpetrators, who turn out to be a member of a teenage gang, run by an ex bank robber.

While in front of the review board facing disciplinary actions, Lindsay receives a distressed call from her mother who has found her boyfriend shot.

[27] Set to recur as Hailey Upton, a robbery homicide Detective, Tracy Spiridakos joins the cast, with her first episode slated to air in early May.

[28] Squerciati took maternity leave from the show in March 2017, and Kim made her temporary departure in "Last Minute Resistance".