Ever since she was a little girl learning to make decadent truffles in her family's chocolate shop, Juliet Arabella has been aware of the bitter feud between the Arabellas and the Mezzanottes. With their rival chocolate boutiques on the same street in Napa Valley, these families never mix. Until one night, when Juliet anonymously attends the annual masquerade ball. In a moonlit vineyard, she finds herself falling for a gorgeous stranger, a man who reminds her what passion is like outside of the kitchen. But her bliss is short-lived when she discovers her masked prince is actually Leo Mezzanotte, newly returned from Paris and the heir to her archenemy's confection dynasty.

With her mind in a whirl, Juliet leaves for Italy to represent the Arabellas in a prestigious chocolate competition. The prize money will help her family's struggling business, and Juliet figures it's a perfect opportunity to forget Leo…only to find him already there and gunning for victory. As they compete head-to-head, Leo and Juliet's fervent attraction boils over. But Juliet's not sure whether to trust her adversary, or give up on the sweetest love she's ever tasted….