Geoffrey Tempest is desperately in love with aspiring writer Mavis Claire, a tenant of his boardinghouse. Unable to marry her due to his poverty, in his anger, he curses God for abandoning him. Soon, Geoffrey meets Prince Lucio de Rimanez, a wealthy, urbane gentleman who informs Geoffrey that he's inherited a fortune, but that he must place himself in the Prince's hands in order to enjoy the fruits of his inheritance. What Geoffrey doesn't know is that Prince Lucio is actually Satan.