A new chief shakes things up at Firehouse 51. Violet and Novak work to uncover the truth behind a car crash.
Pascal and Severide revisit the storage facility fire in hopes of uncovering new evidence. Cruz helps Mouch take his studying to the next level. Novak prepares a proposal for Chief Robinson for a whole blood program.
Severide gets wrapped up in an Illinois State Police investigation after discovering illegal guns on a call. A bird harasses Mouch on the apparatus floor. Kidd keeps an eye on Carver as his attitude worsens.
Severide and Van Meter investigate a fire at a family-owned restaurant. Pascal questions Kidd's leadership.
Kidd and Severide investigate a trucking company responsible for a string of accidents.