Severide hides his serious shoulder injury as he tries to rescue a construction worker from a collapsed building; two teens become trapped in a vehicle.
Rhodes and Zanetti race to save a member of Firehouse 51, April's brother struggles during his first day at the hospital, and a woman saved from a burning building leads to a bigger mystery.
Casey faces the consequences of confronting Detective Voight; Dawson's career hangs in the balance after her questionable conduct on a call.
Chief Boden comes under fire when the press blame him for the death of a homeless man, while Shay has a nasty run-in with her ex.
Dawson runs a secret errand and gets trapped in a collapsed parking structure; Casey starts taking on additional duties; Kidd becomes increasingly sceptical of Hope.