Rachel Cerda

In an effort to recreate the missing piece of the tattoo, Michael gets transferred to the psych ward, seeking the help of Haywire. Meanwhile, T-Bag and C-Note have to join forces.

Dawson attempts to help her brother Antonio unravel the details of his drugs-and-gang investigation, and goes behind his back in turning to an unlikely source for assistance.

Lindsay is forced to turn to Voight and the Intelligence Unit for help with her first case on the federal task force.

When the FBI takes over the firehouse for an undercover mission, Casey and Severide volunteer to assist with the investigation. Meanwhile, Kidd attempts to help Severide come to terms with recent developments he has been managing.

When a subway train goes off the tracks, Marcel volunteers to help the victims; Taylor and Halstead must decide if they're willing to risk their jobs to save a patient; Asher and Archer clash over a pregnant patient.