When heiress Audrey Hardwick is given the opportunity to become a Pinkerton Agent, she wholeheartedly leaves her life in Cincinnati behind and sets out for a new adventure. But her mission turns into mayhem when she meets Agent Warren Rockwell, a former gunslinger, who is too stubborn – and handsome – for his own good. Will she succeed in proving her worth as an agent, and as a woman, or will Warren always view her as his reluctant partner?