Order 11: Family Ties

Summary: Dracula moves on. He decides to investigate what has become of his old family castle and finds a pair of adolescent siblings who turn out to be his great grand-children, Princess Zsuzsanna and Prince Arkady. He proposes a deal to the thirteen year old Zsuzsanna: if she and her brother can retain their innocence until both are seventeen, he'll return and turn them into vampires.