Rocana Brunt helps her cousin Lady Caroline to meet secretly the man she loves. Then Caroline is told she is to marry the Marquis of Quorn who is in a tight corner over one of his many liaisons. Caroline is broken-hearted, but the Marquis, to save himself, wishes to be married immediately.

Because she loves Caroline and because she is so unhappy, Rocana agrees to take her cousin’s place at the altar while Caroline elopes.

How the deception is not discovered until Rocana and the Marquis reach Paris, how she finds herself in dangerous situations and how by a magic, unbreakable spell she eventually finds happiness is told in this exciting romantic tale by Barbara Cartland.