Conrad and The Raptor help out an old friend whose heart problems reveal a bigger issue than they anticipated. Meanwhile, Devon treats a suicidal woman whom he thinks might be…

Severide struggles with the cost of helping Det. Pryma with the Martucci case. Gallo campaigns for Herrmann to represent 51 at the National Firefighter’s Association’s Winter Conference. A familiar face…

Det. Pryma’s case comes to an explosive end with Kidd and Carver’s lives in danger. Brett installs an infant safe surrender box at 51. Violet is determined to take Emma…