Pete rethinks his career after learning that not every call has a happy ending, and Shay decides if she has a future with a married woman.
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.
Casey falls under the thumb of a rogue cop after a horrific car crash, while new girl on the block Nicki pays Severide special attention.
Randall and Beth adjust to a new family dynamic. Kate books her first big gig. Kevin suffers a setback on his movie. Jack and Rebecca are visited by an unwelcome guest.
Casey's run for Alderman is put in jeopardy when his opponent launches a propaganda attack against him. Meanwhile, Mouch has a bachelor party.