The heat is on in Atlanta when the BAU investigates murders of women and realizes they are looking for more than one unsub.
The new Seattle fire chief is introduced to Station 19 and leaves the crew skeptical; a department store fire caused by exploding fireworks triggers painful memories from Ben's past and inspires him to pursue a new endeavor.
While Pruitt grieves a monumental loss, Andy refuses to do the same and, instead, throws herself into work; the crew responds to a widespread carbon monoxide leak; Sullivan makes a controversial choice for captain.
After some tense and traumatic experiences, the firefighters get a visit from a psychologist.
In an effort to increase morale, Maya takes the crew on a team-building camping trip that doesn't exactly go according to plan; the crew works to save first-time campers after a bear attack; Pruitt takes steps to repair his relationship with Andy.