When Lady Isabella pays witness to her mother’s murder—by her father, the Earl of Craythorne—she rides off to London in search of the man she was told to find in case anything bad should happen. With directions that take her to The Elegant Courtesan, a high-end brothel owned by David Fitzwilliam, Earl of Norwick, Isabella relates her horrible tale. Stunned and heartbroken at hearing the fate of Arabella Brotherton, David vows to keep Isabella safe from Craythorne and enlists the aid of Octavius, Duke of Huntington, in providing protection and a home in the country. He would do it himself, but he’s due to marry the girl’s aunt, Clarinda, and he has some courting to do given his twin brother is determined to make Clarinda his own wife.
A widower, Octavius is still dealing with his wife’s death during childbirth. His last words to her were a promise he would never love another. No longer interested in hobbies such as horse racing, he has ignored his stables in favor of concentrating on Parliament and life in London. Not particularly pleased with having a ward, Octavius soon discovers Isabella’s obsession with horses goes far beyond riding them. Her dedication to seeing to a new generation of race horses as well as maintaining his country estate may have him experiencing a bit of horse sense in "The Dream of a Duchess".