"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, Jeremy's country estate, Diana is shocked when Jeremy appears at her...

When they first meet, Bailey and Charlie cannot stand one another, but when they met a year later as coworkers, Charlie secretly bets a colleague he can get Bailey to go out with him, and their relationship gets more complicated as they get closer and closer.