The series begins with "The Rising"—a catastrophic volcanic eruption of the Yellowstone caldera that blankets the earth in ash, blocking out the sun and allowing vampires to emerge from the shadows and take over society.
: A fierce, often reluctant savior driven primarily by the search for her missing daughter, Dylan. Over the seasons, her character arc explores the darkness within her own lineage.
: Vanessa (played by Kelly Overton) possesses a unique blood composition that not only makes her immune to vampire bites but allows her to turn vampires back into humans by biting them.