1947. In the chaotic aftermath of World War II, American college girl Charlie St. Clair is pregnant, unmarried, and on the verge of being thrown out of her very proper family. She's also nursing a desperate hope that her beloved cousin Rose, who disappeared in Nazi-occupied France during the war, might still be alive. So when Charlie's parents banish her to Europe to have her "little problem" taken care of, Charlie breaks free and heads to London, determined to find out what happened to the cousin she loves like a sister.

Everyone keeps to themselves at Briarwood House, an all-female boarding house in the heart of the US capital, where secrets hide behind respectable facades.But when the mysterious Grace March moves into the attic room, she draws her oddball collection of neighbours – a poised English beauty, a policeman’s daughter, a frustrated female baseball star, and a rabidly pro-McCarthy typist – into an unlikely friendship.Grace’s weekly attic-room dinner parties and window-brewed sun tea become a healing balm on all their troubled lives, but she hides a terrible secret of her own. And when a shocking act of violence tears the house apart, the Briar Club must decide once and for all: who is the true enemy in their midst?

British war correspondent Ian Graham abandons journalism to become a Nazi hunter, yet one target eludes him: the Huntress. And Nina Markova is the only witness to escape her alive.In post-war Boston, seventeen-year-old Jordan McBride is increasingly disquieted by the soft-spoken German widow who becomes her new stepmother. Delving into her past, Jordan slowly realizes that a Nazi killer may be hiding in plain sight.

Vivacious debutante Osla has the dashing Prince Philip of Greece sending her roses – but she burns to prove herself as more than a society girl, working to translate decoded enemy secrets. Self-made Mab masters the legendary codebreaking machines as she conceals old wounds and the poverty of her East-End London upbringing. And shy local girl Beth is the outsider who trains as one of the Park’s few female cryptanalysts.