The widowed Diana, Lady Templeton and Jeremy, Marquess of Willingham are infamous among English high society as much for their sharp-tongued bickering as their flirtation. One evening, an argument at a ball turns into a serious wager: Jeremy will marry within the year or Diana will forfeit one hundred pounds. So shortly after, just before a fortnight-long house party at Elderwild, Jeremys country estate, Diana is shocked when Jeremy appears at her home with a very different kind of proposition.