Severide tries to prove his suspicions about the arsonist's identity, Casey gets accustomed to his new lifestyle, and Dawson goes on a date with a regular from the bar.
As Officers Atwater and Burgess attempt to protect a new patrol car, a cocaine-fuelled assault leads them to a drug smuggling ring.
The Intelligence Unit is called in after a key witness in a rape case is murdered. Elsewhere, Antonio gets a new opportunity.
Doctors Manning and Rhodes suspect that two separate cases involving sick babies may be connected. A homeless patient's upbeat disposition enlightens Doctors Halstead and Charles, and Dr Choi and a Navy corpsman deal with the toll of gang violence.