With no way to finance his prestigious education, William decides to search through his uncle's mansion for something of value to sell. But William's logical worldview is about to take a hit, when he comes across a mystical seal which he unintentionally uses to summon a demon. The demon's name is Dantalion, a Grand Duke of Hell, who informs the young nobleman of his destiny - that he is the new Elector whose sole responsibility is to appoint the next ruler of Hell in place of Lucifer. None of this can possibly be real - can it? - and besides, he's got bills to pay.