Content with her spinster lifestyle, Miss Sybil Cunning wants to prove that a future as an unmarried woman is the only life for her. As a bluestocking who values hard, empirical data, Sybil needs help with her research. Nolan Pratt, Baron Webb, one of society's most scandalous rakes, is the perfect gentleman to help her. After all, he inspires fear in proper mothers and desire within their daughters.

Society may be aware of Nolan Pratt, Baron’s Webb’s wicked ways, but what he has carefully hidden is his miserable handling of his family's finances. When Sybil presents him the opportunity to earn much-needed funds, he can't refuse. However, what begins as a business arrangement becomes something more and with every meeting, Sybil slips inside his heart. Can this clever woman look beneath the veneer of a coldhearted rake to see the man Nolan truly is?