 He summons a parliament, which decides to send the former-archangel-now-archdevil Belfagor to the Earth to investigate.Belfagor assumes a human form as one Roderigo of Castile, and comes to Florence with a hundred thousand ducats; he marries a woman named Onesta Donati.Soon, her vanity and wasteful spending, combined with the demands of her relatives, reduce him to poverty and debt.