The bet was simple. The plan was perfect. The result was bewildering. To win a high-stakes wager, Ambrose Hartley must find a wife, preferably one that will help secure his ideal future. Hardened by past disappointment, he is avoiding fickle emotions by focusing on a logical list of requirements. His plans include a serious courtship, a suitable partner, and a predictable life. Susanna Fenton is unpredictable, unsuitable, and rarely serious. A contented spinster, she believes love is the only proper reason to surrender her freedom. Having known Ambrose since childhood, she doesn't hesitate to mock his plan. But as she watches him court eligible ladies, she begins to wonder if what she feels isn't sisterly concern but jealousy. As Ambrose's plan unravels, Susanna worries that she will never measure up to his impossible standards. With their mutual misunderstandings mounting and six-hundred pounds on the line, can they find the courage to risk their hearts for a future they never thought to plan?