Miss Onyx Hamilton is on the verge of making what everyone agrees is a perfect marriage. The overwhelmingly respectable Andrew Littletree is so taken by her virtue and beauty that he's willing to overlook the scandal clouding her birth and her lack of family and funds. But then handsome, charming Major Jack Beresford comes galloping into Onyx's sheltered life. With his wealth and aristocratic blood, Onyx knows it's highly improbable that he would ever ask for her hand. Fortunately, the laws of probability have no effect on what Onyx is ready to give this supremely unsuitable gentleman. Her heart.