A young boy and a girl with a magic crystal must race against pirates and foreign agents in a search for a legendary floating castle.

D has been hired to track down Meier Link, a notoriously powerful vampire who has abducted a woman, Charlotte Elbourne. D’s orders are strict – find Charlotte, at any cost. For the first time, D faces serious competition. The Markus Brothers, a family of Vampire Hunters, were hired for the same bounty. D Must intercept Meier and conquer hostile forces on all sides in a deadly race against time.