England, 1939: The Penrose sisters couldn't be more different. Skye is a daring and brash pilot, and Liberty is the one to defy her at every turn. Even if women aren't allowed in the Royal Air Force, Skye is determined to help the war effort. She's thrilled when it reunites her with her childhood soul mate, Nicholas. She's less thrilled to learn Nicholas is now engaged to an enigmatic Frenchwoman named Margaux Jourdan.

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.

Paris, 1939. Maison Chanel has closed, thrusting haute couture dressmaker Lila de Laurent out of the world of high fashion as Nazi soldiers invade the streets and the City of Lights slips into darkness. Lila’s life is now a series of rations, brutal restrictions, and carefully controlled propaganda while Paris is cut off from the rest of the world. Yet in hidden corners of the city, the faithful pledge to resist. Lila is drawn to La Resistance and is soon using her skills as a dressmaker to infiltrate the Nazi elite.

Elisabeth Eidenbenz left Switzerland in 1937 to aid children orphaned during the Spanish Civil War. Now, her work has led her to France, where she's determined to provide expectant mothers and their unborn children a refuge amid one of the worst humanitarian crises of the twentieth century. Desperate to escape the invasion of Franco's Fascist troops, Isabel Dueñas becomes one of many Spanish patriots fleeing their country. She leaves behind her husband as he fights for democracy, and she seeks asylum in a refugee camp across the border in France.

New York, 1898. The only thing more shocking than Arthur Stanhope III’s unexpected death is the revelation that his will bestows his company—and most of the vast fortune that goes with it—to the nearest male heir, leaving his mother, wife, and daughter nearly impoverished. His widow, Sylvia, quickly realizes she must set aside her grief to ensure their daughter, Adelaide, is launched into society as soon as the appropriate mourning period passes.