Vic and Travis’ friendship is put to the test as they respond to calls to help two best friends in need. Meanwhile, Jack realizes he has a greater impact on Marcus than he realizes, and new details about Travis’ late husband’s tragic death are revealed.

When a heat wave hits Seattle, Station 19 becomes a cooling center and chaos ensues with locals who aren’t used to the extreme temperatures. Andy deals with regret and finds a friend in Theo. Joey comes face-to-face with his past during a ride-along with Ben and Jack

The Station 19 crew offers aid to a man who sets himself on fire. Theo proves his devotion to Vic; Sullivan seeks advice from Dr. Webber; and Travis comes to a realization about his love life.

Andy's fate remains unknown as a trial date is set. Meanwhile, Vic and Sullivan are approached by an unexpected guest, and the crew responds to a row of townhouses on fire.

When a lightning storm crashes a helicopter, the team is drawn away from hosting a fire boot camp for young women, and Natasha calls on Jack to help Vic run the camp instead. As the storm brews outside, things get even more heated inside between Carina and Maya on the fall finale of Station 19.

The team is forced to make a risky call that could cost them dearly after Tomás’ barbershop catches fire. Diane drops by the station and is called back into action alongside Vic and Carina. Beckett makes a decision about his future.