EIGHTEEN YEARS AFTER THE END OF THE WORLD, LIFE GOES ON. Charlotte and Joe D?ith?n are dhampirs: half-human, half-vampire. But beyond their unique heritage, and the fact that their parents saved the human race from extinction, they have little in common. Charlotte is in training to take over from her mother as the Sentinel, a powerful and self-assured warrior. Comfortable with her destiny, and madly in love with her girlfriend Emily, there's little else she wants from life. Joe still has a lot of growing up to do. His life revolves around finding ways to get drunk or stoned with his friends, and duty and battle are the last things on his mind. But between a powerful demon with an unknown agenda, and a drug that provokes a powerful blood lust, both siblings are about to have their lives turned upside down.