Captain Sullivan continues his efforts to bring together the fire and police departments by hosting a training seminar that does not go as planned. Meanwhile, Ben and Miranda have an honest conversation about their marriage, leading Miranda to make a tough decision about their future.

As the team gathers for a Friendsgiving celebration at Dean's, a violent windstorm touches down in Seattle. As the storm picks up speed, creating dangerous fire conditions, the crew must put the festivities on hold and report for duty, leaving some of them in a life-threatening situation.