Miss Juliet Marshville is spitting mad. With one guardian missing, and the other singularly uninterested in her fate, she is at the mercy of her wastrel brother who loses her beloved childhood home to a man known as Sin. Determined to reclaim control of Rosecliff Cottage and her own fate, Juliet arranges a meeting with the notorious rogue and demands the return of her property.

Jonathan Tidemore, 5th Earl of Sinclair, known to the ton as Sin, is exceptionally lucky in life and at the gaming tables. He has just one problem. Well...four, really. His incorrigible sisters have driven off yet another governess. This time, however, his mother demands he find an appropriate replacement.

When Miss Juliet Marshville boldly demands the return of her precious cottage, he takes advantage of his sudden good fortune and puts an offer to her; turn his sisters into proper English ladies, and he'll return Rosecliff Cottage to Juliet's possession.

Jonathan comes to appreciate Juliet's spirit, courage, and clever wit, and decides to claim the fiery beauty as his mistress. Juliet, however, will be mistress for no man. Nor could she ever love a man who callously stole her home in a game of cards. As Jonathan begins to see Juliet as more than a spirited beauty to warm his bed, he realizes she could be a lady he could love the rest of his life, if only he can convince the proud Juliet that he's worthy of her hand and heart.