A vampire-flipped Dracula in which mortality means life... And life means death. Vampires Jonathan Harker, Lucy Westenra, and Mina Murray live in underground London, trying to keep the undead city safe from the rumored mortals above who seek to give them life, only to kill them. The vampires find themselves up against more than just the deadly light of the sun when a perilous journey into the city above takes a fatal turn.