In Paris around 1900, Arthur and Margaret are engaged to be married. Everyone approves and everyone seems to be enjoying themselves. Until Oliver Haddo appears. Sinister and repulsive, Haddo fascinates Margaret's spinster friend, Susie Boyd. Yet it is not Susie who ultimately falls prey to this peculiar charm. It is Margaret, and a fate worse than death awaits her in the form of the evil Haddo.