The widow of a famous bishop, Grace Marlowe is both shocked and intrigued by the amorous adventures of her fellow Merry Widows. Though she agreed to their pact, she can't imagine giving herself over to passion-until the most notorious libertine in London sets his sights on her.

John Grayston, seventh Viscount Rochdale, has never refused a wager. Now he's willing to stake his most prized possession that there's not a single woman in all England immune to his charms. But when the object of the wager is the prim and proper Grace Marlowe, he has to turn on the full force of his seductive allure-without losing his heart.