The year is 1959. "Erika Lehmann and Zhanna Rogova, two members of a CIA field agent team codenamed the Shield Maidens, are off duty and going about their lives in Evansville, Indiana, where Erika owns a café and where Zhanna works. One day a young man shows up at the café and befriends the Russian Zhanna Rogova. Little do the two Shield Maidens know that the good-natured and friendly young man has been sent to Evansville by the Soviet KGB with Zhanna as his target."