At an archduke's reception, a handsome young nobleman falls under the spell of a malevolent but irresistible sorceress. Two hundred years later Belinda Seward falls prey to sensual forces she can neither understand nor control. Stranded by a thunderstorm at a remote Gothic priory, she is drawn into an enclosed world of decadence and sexual alchemy. Her host is the courteous but melancholic Andre von Kastel. He has plans for Belinda that will take her into the realms of obsessive love and the erotic paranormal.