After a car crashes into Joe's Bar, Andy and Sullivan lead the team of firefighters as they work to rescue people before the building comes crumbling down.
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.
Ben and Jack must appease a group of homeless foster and biological siblings so they can help save a life; Maya pushes the team too hard and struggles to bring them together; Pruitt threatens to take drastic action when refused a request.
In an effort to increase morale, Maya takes the crew on a 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.
Emotions are running high, as Seattle is covered by a blizzard and Travis is forced to make the toughest call of his career; with lives on the line, the crew face up to some hard truths; Ben has rising suspicions about a colleague.
As Ben readies the new Physician Response Team truck for the field, his suspicions about Sullivan and the missing Fentanyl continue to grow; Jack and Rigo try to look past their differences when they are forced to work together.
When an Army veteran threatens to blow up a pawn shop, Sullivan reflects on his time as a Marine. Vic and Dean try to reason with a man battling Alzheimer's disease, and Pruitt takes a stand to honor fallen firefighters.
While at a lunch seeking Pruitt's blessing for their relationship, Andy and Sullivan jump into action when immigration officials raid the restaurant; Travis gets roped into an awkward lunch with Chief Dixon, Emmett and Emmett's girlfriend.
Things get complicated as the crew battles a fire at a storage facility. Dr. Jackson Avery visits from Grey Sloan and ends up collaborating with old pal Ben Warren.
Vic rallies the crew to pose for a calendar photo shoot that will support a good cause. Meanwhile, Emmett comes clean to Ben and Sullivan, and shows Andy a softer side.
Andy and Jack fight to save people who are trapped in a collapsing bowling alley; Ben confronts Sullivan about his drug problem; Maya's mother pays her a visit.
Ben, Jackson and Emmett are put in a precarious and dangerous position with a potential victim; Andy's search for more background on her family opens her eyes; Vic and Travis are caught in the middle of a corruption scheme.
Andy becomes suspicious of the circumstances surrounding her mother's death; the crew works to evacuate a doctor from Pac-North hospital and find themselves in a life-threatening situation; Sullivan undergoes surgery for his leg pain.
