New York City, 1943: War widow and Best Society’s darling Mrs. Evelyn (Evie) Rousseau Somerset is five months into mourning her husband’s death when her family insists on an untenable plan for her future. Desolate and disenchanted with life, she’s determined to remake herself and prove she’s something more than a useless socialite—regardless of what her Senator brother and domineering mother demand of her. A previous clandestine job at a newspaper provides the escape she’s looking for: a trip to neutral Lisbon, the spy capital of the world, to rescue a family of German Jews stranded in Portugal. While crossing the Atlantic to Lisbon, she meets handsome and enigmatic Carl Wilson, the cocksure, ill-mannered American musician with an agenda and secrets of his own. Armed only with sophistication and moxie, Evelyn reluctantly welcomes Carl’s invitation to a new world—one that ultimately lands her as a secret agent for His Majesty’s government.