In the drama series' second season, the men and women of Firehouse 51 face an uncertain future after learning that their station may be slated for a shutdown. Meanwhile, Lt. Severide (Taylor Kinney) is targeted by a serial arsonist; Lt. Casey (Jesse Spencer) becomes a temporary guardian to Andy's two young children after their mother is in a drunken-driving accident and arrested for manslaughter; and Mouch (Christian Stolte) runs for union president. In non-firehouse-related events, a shady individual threatens Molly's bar, and Herrmann (David Eisenberg), Dawson (Monica Raymund) and Otis (Yuri Sardarov) fight to keep it in business. The season includes a crossover episode with "Chicago PD."