Severide and Boden search to uncover whether arson was the cause of a fire at a hair salon. Mouch, Herrmann, Otis and Kidd make a startling discovery while tracking down the missing piercing nozzle from Engine 27.

Aaron Munoz, Alma Washington, Andrew Varela, Anthony Ferraris, Ariane Reinhart, Collin McShane, Daniel Kyri, Erin Breen, Geno Walker, Holly Dowell, Nidhi Ghildayal, Peter Goldsmith, Randy Flagler, Samantha Massell, Teddy Sears, Zenzi Williams