Synopsis

Lieutenant Severide is eager to connect the dots and expose the serial arsonist, while Dawson and Shay experience a startling event during what should have been a routine call. Simultaneously, suspicion continues to fall on Clarke as the source of a leak within the firehouse, and Molly's financial difficulties worsen. Meanwhile, Mouch mounts a campaign for union president, aided by Isabella, and Boden finds himself in conflict with Gail McLeod.