Paris, 1944: The war is nearly over, but for members of the Resistance in occupied France, it is more dangerous than ever before. Twenty-five-year-old Gabby Foucher loathes the Nazis, though as the concierge of 10 rue Royale, she does her best to avoid conflict - unlike her bolder sister Yvette, who finds trouble at every turn.

Cleo Davenport has heard the whispers: the murmured conversations that end abruptly the second she walks into a room. Told she was an orphan, she knows the rumor—that her father is none other than the Prince of Wales, heir to the British throne. And at her childhood home at Cairo’s Shepheard’s Hotel, where royals, rulers, and the wealthy live, they even called her “The Princess.” But her life is turned upside down when she turns seventeen. Sent to London under the chaperonage of her very proper aunt, she’s told it’s time to learn manners and make her debut.

World War II London: When Victoire “Paddy” Bennett first walks into the Admiralty’s Room 39, home to the Intelligence Division, all the bright and lively young woman expects is a secretarial position to the charismatic Commander Ian Fleming. But soon her job is so much more, and when Fleming proposes a daring plot to deceive the Germans about Allied invasion plans he requests the newlywed Paddy's help. She jumps at the chance to work as an agent in the field, even after the operation begins to affect her marriage. But could doing her duty for King and country come at too great a cost?

Camille is a nurse specialising in supporting families through the difficult decision to donate the organs of their dying loved ones. Camille's mother is a gifted but uncompromising transplant surgeon determined to make it in a man's world until her own life falls apart. And Camille herself is a mother to Addie–five years old, critically ill and in desperate need of the very organs her mother and grandmother work with.

1940. In a world newly burning with war, and in spite of her American family’s wishes, Virginia d’Albert-Lake decides to stay in occupied France with her French husband. She’s sure that if they keep their heads down, they’ll survive. But is surviving enough? Nineteen-year-old Violette Szabo has seen the Nazis’ evil up close and is desperate to fight them. But when she meets the man who’ll change her life only for tragedy to strike, Violette’s adrift.