Jack and Maya are called to treat people stuck in a subway train and discover a potential threat to the passengers and themselves. Meanwhile, Travis, Ben and Dean get pressured into inviting Sullivan to help repaint walls in Travis’ house and come to a surprising conclusion about Sullivan.

A blackout in Seattle creates dangerous situations throughout the city and the members of Station 19 head out on calls, including locating a missing girl and helping a man on life support where every second counts.