Kidd and Severide investigate a trucking company responsible for a string of accidents.
Violet risks her job to deliver a baby on a tragic call. Mouch, Capp and Tony help Cruz track down Javi's stolen bike.
Firehouse 51 is forced to share its space with Firehouse 17. Kidd and Herrmann fight over Ritter. An arson case tests Kidd and Severide's relationship. Firehouse 51 says goodbye to one of its own.
Mouch sets out to change his legacy and nickname. Ritter pushes Herrmann to see a doctor. Brett searches for the perfect wedding venue.
Severide goes for an unexpected ride on Truck 81. Ritter's worlds collide when his secret cop boyfriend helps 51 track down Severide and the missing rig.
