Foreign diplomacy is the Zivon family business but Alexei resists the polite constraints, not lasting a year in law school. The four successful years working as a Pinkerton agent prove he was meant to follow a different path. Now, he's faced with the biggest challenge of his career?training a female agent who has no practical skills. Alexei figures he can convince her to just observe as he solves the case, because nothing will interfere with his success rate.

Since childhood, Dixie LaFontaine lived in her older sister's shadow but applying to become a Pinkerton Agent is her first major decision. Being matched with confident Alexei is intimidating, especially when the assigned case involves them pretending to be brother and sister at a health spa where jewelry has gone missing. Dixie has no qualms about pretending to be a French heiress needing care for her arthritis. Soon, she falls victim to Alexei's charm and realizes that hiding her feelings might be as hard as ferreting out the thief among the spa's clientele.

Will Dixie focus on learning the skills of an agent, or will she concentrate on turning her marriage of convenience into a lasting love?