Sir Neville Fortescue MP comes from a long line of rakes and hell–raisers and he's determined to live a decent life. He certainly doesn't associate with women like the notoriously unconventional Diana, Duchess of Medbourne.

But when Neville and Diana are forced together to help a servant girl, they plunge into a shady world of brothels, plots and murder. Neville realizes that he has underestimated the beautiful young widow and his own love of danger and adventure. Could staid Sir Neville be a fit match for the Daring Duchess?