It's a vampire. But not just a vampire. It's the original vampire. Even the most appalling legends fail to convey how deadly it really is. After a miraculous escape, Dex and Daphna are desperately racing the clock as a plague spreads across the country. The twins must find what the monster really wants in order to stop it. What they discover about the thing-and what they discover about themselves-will launch the already controversial Sacred Books Series to positively incendiary heights.