 When a man named Paul Yeager loses his wife to Lucard s second-in-command, Klaus (Geraint Wyn Davies), he attempts to enlist Gustav to help him kill the vampire. Gustav, however, is strangely unwilling to give aid in this, even going so far as to warn Klaus that Yeager is after him. While the children are led on a treasure hunt by a scheming Lucard, we eventually learn why Gustav is so evasive regarding Klaus and also why he is so uncooperative in bringing about his death, choosing instead to trap him in his crypt with help from an unlikely ally.