Lady Calpurnia Hartwell has always played by society's rules, leaving her overlooked and unfulfilled. But one daring decision changes everything. Armed with a list of nine forbidden acts—from gambling in exclusive gentlemen's clubs to firing a pistol—Callie sets out to live life on her own terms.

Her adventurous escapades lead her straight into the arms of Gabriel St. John, the irresistibly charming Marquess of Ralston known for his scandalous reputation. As their paths intertwine, sparks ignite, and Callie finds herself drawn deeper into a world of passion and intrigue.

With each rule she breaks, she risks not only her reputation but also her heart. When desire turns into something more profound, Callie faces the ultimate challenge. Will she surrender to love and risk everything she holds dear?