Scanlon is haunted by dreams of his late brother, leaving Allison concerned about her colleague. Also, while making her final preparations for college, Ariel has visions of missing young women, past and present.
A code black at Angels Memorial takes a turn for the worse when a city-wide blackout leaves the hospital without power or back-up generators. As Campbell and Leanne divert high-risk patients to a nearby care center, Elliot and Heather are trapped in an elevator with a woman in labor, and Willis and Dr. Nolan (Kathleen Rose Perkins) try to help a 92-year-old woman who thinks it's 1942.
