Evie Harlow runs a quaint little bookshop in London, which is the biggest adventure an unmarried woman with no prospects could hope for. Until Maximillian Shaw, Duke of Westbourne, saunters into her shop with a proposition: to win a bet with his friends, he'll turn her into the diamond of the season. The duke might be devilishly attractive, but Evie has no intention of accepting his ludicrous offer. When disaster strikes her shop, however, she's left with little choice but to let herself be whisked into his high-society world.

Always happy to help a lady in distress, Max thinks he's saving Evie from her dull spinster's life. He'll help her find a husband and congratulate himself on a job well done. But as shy Evie becomes the shining star he always knew she could be, she somehow steals his heart. And when her reputation is threatened, can Max convince her to choose a glittering, aristocratic life with him over the cozy comfort of her bookshop?