velyn Varley has always been ambitious and clever. As a girl, she earned a scholarship to a prestigious academy well above her parents' means, gaining her a best friend from one of England's wealthiest families. In 1939, with an Oxford degree in hand and war looming, Evelyn finds herself recruited into an elite Ml5 counterintelligence unit. A ruthless secret society seeks an alliance with Germany, and posing as a Nazi sympathizer, Evelyn must build a case to expose their treachery. But as she is drawn deeper into layers of duplicity-perhaps of her own making— some of those closest to her become embroiled in her investigation. With Evelyn's loyalties placed under extraordinary pressure, she'll face an impossible choice: save her country or the people who love her.