His family finances in ruins, Ioan St. John, Duke of Blackthorne has reluctantly agreed to marry one of the "Dollar Princesses"—American heiresses who are willing to exchange their fortunes for a title and a place in English society. Sophie Montgomery is one of these princesses, the only daughter of a wealthy New York family with grand social ambitions. A bit of a wallflower back home, Sophie is apprehensive, but willing to take the chance on marrying a man she's not even met yet. Although both are hesitant at first, neither can deny the pull the other has over them. However, neither one of them expected the their path to happiness detoured by a betrayal that threatens to destroy them both.