What Fujiko has picked out for her wedding ring is the legendary Hope Diamond, said to cause all its possessors misfortune. During the taking of it from the Smithsonian Institution, Lupin suffers a multitude of bad luck and disasters. This diamond really is possessed by a demon. Even though they manage to hold the wedding, Fujiko transforms into an old woman! Will love's tenacity win out?! Whose face is that in the mirror?