Severide finally addresses Chief Boden about his injury and makes some important personal decisions about his future. Meanwhile, Casey struggles with family matters and Dawson takes matters into her own hands.
Antonio struggles with a guilty conscience after he tries to take down a major drugs dealer. Voight goes to extreme measures to protect his team.
With a new, powerful entry in the political race, Kane and his people flex their political muscles to maintain their hold. Meanwhile, a worried Meredith suspects her husband is keeping something from her.
Kane and Stone try to work their political magic on election day, but the race proves to be a close one. Meanwhile, Miller gives a tough team talk to his editorial staff.
The case against Alderman Gibbons escalates, and Teresa, Jarek and Caleb scramble to locate a star witness. As undercover cop Liam Hennessey continues to assemble evidence, he's forced to take matters into his own hands.