Severide and Seager team up to investigate a fire at the home of a troubled young woman. Pelham moves into 51's rumored cursed office. Kylie assists Kidd with Girls on Fire.

With Gideon hurt, the Legends only have one way to save her. Once Evil Gideon is active, she continues to try to destroy the Legends, until Gideon reminds her of a certain protocol she must follow. Trying to help, Gideon negotiates a deal to save the Legends but to get them to agree, she breaks a major rule. Meanwhile, the Legends come up with another plan that could potentially solve all their problems.

Jimmy invites people all over the world to show off their talents in Show Me Something Good, then catches up with Tracee Ellis Ross and Jabari Banks before enjoying a musical performance from Koffee.