When Jessica and her twin sister, Jane were born, it was prophesized that one would go mad. When the two girls were young, Jessica was disobedient and independent while Jane was quiet and a model of decorum. Jessica's parents kept the fact that they had twins a secret and few knew about Jessica because her parents were convinced she was the one who would go mad.
Nicholas Garrett, Earl of Wyndfell arranges to marry Jane. But Jane does not like his rough manners or the fact that his castle is in a remote area away from Queen Elizabeth's court in London. As well, Jane has her eye on another man. She convinces Jessica to pretend to be her. Jessica, eager to leave her confining home, agrees and no one except the twins know they have switched places.
Nicholas is surprised that is not as quiet as she was reputed to be but she soon shows Nicholas she can put both he and his castle in order. The sex between them is passionate and Nicholas starts falling in love with his wife. Jessica also starts to love Nicholas but it hurts that he calls her by her sister's name. Then Jane shows up at the castle. She has heard Jessica and Nicholas making love and she wants to try Nicholas in bed. Jessica realizes her sister is going mad. But she cannot figure out how to handle her sister without giving away the deception.
This report prepared by L. Watson