December 1940. As German bombs fall on Southampton, England, the city's residents flee to the surrounding villages. In Upton village, amid the chaos, newly married Ellen Parr finds a girl asleep, unclaimed at the back of an empty bus. Little Pamela, it seems, is entirely alone. Ellen has always believed she does not want children, but when she takes Pamela into her home, the child cracks open the past Ellen thought she had escaped and the future she and her husband, Selwyn, had dreamed for themselves. As the war rages on, love grows where it was least expected, surprising them all.

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.

San Francisco, 1906. In a city bustling with newly minted millionaires and scheming upstarts, two very different women hope to change their fortunes: Gemma, a golden-haired, silver-voiced soprano whose career desperately needs rekindling, and Suling, a petite and resolute Chinatown embroideress who is determined to escape an arranged marriage. Their paths cross when they are drawn into the orbit of Henry Thornton, a charming railroad magnate whose extraordinary collection of Chinese antiques includes the fabled Phoenix Crown, a legendary relic of Beijing’s fallen Summer Palace.

In the summer of 1951, Miranda Schuyler arrives on elite, secretive Winthrop Island as a schoolgirl from the margins of high society. When her beautiful mother marries Hugh Fisher, Miranda’s catapulted into a heady new world of pedigrees and cocktails. Isobel Fisher, Miranda’s new stepsister is eager to draw Miranda into the arcane customs of Winthrop society. But there are really two clans: the summer families with their steadfast ways and quiet obsessions, and the working class of Portuguese fishermen and domestic workers. Then Miranda is caught in a catastrophe and banished....

In the autumn of 1948, Iris Digby vanishes from her London home with her American diplomat husband and their two children. The world is shocked by the family’s sensational disappearance. Were they eliminated by the Soviet intelligence service? Or have the Digbys defected to Moscow with a trove of the West’s most vital secrets?

August 1939: London is dismal under the weight of impending war with Germany as Hitler’s forces continue to sweep across Europe. Into this uncertain maelstrom steps Grace Bennett, young and ready for a fresh start in the bustling city streets she’s always dreamed of - and miles away from her troubled past in the countryside. With aspirations of working at a department store, Grace never imagined she’d wind up employed at Primrose Hill, an offbeat bookshop nestled in the heart of the city - after all, she’s never been much of a reader.

Sophie Whalen is a young Irish immigrant so desperate to get out of a New York tenement that she answers a mail-order bride ad and agrees to marry a man she knows nothing about. San Francisco widower Martin Hocking proves to be as aloof as he is mesmerizingly handsome. Sophie quickly develops deep affection for Kat, Martin's silent five-year-old daughter, but Martin's odd behavior leaves her with the uneasy feeling that something about her newfound situation isn't right.

Georgeanna “Georgey” Woolsey isn’t meant for the world of lavish parties and the demure attitudes of women of her stature. So when war ignites the nation, Georgey follows her passion for nursing during a time when doctors considered women on the battlefront a bother. In proving them wrong, she and her sister Eliza venture from New York to Washington, DC, to Gettysburg and witness the unparalleled horrors of slavery as they become involved in the war effort.

In Nottingham, England, widow Emma Taylor finds herself in desperate need of a job. She and her beloved daughter Olivia have always managed just fine on their own, but with the legal restrictions prohibiting widows with children from most employment opportunities, she’s left with only one option: persuading the manageress at Boots’ Booklover’s Library to take a chance on her with a job.

As the war begins, Hanna Rombauer, a young German woman, is sent to live with her aunt and uncle after her mother’s death. Thrown into a life of luxury she never expected, Hanna soon finds herself unwillingly matched with an SS officer twenty years her senior. The independence that her mother lovingly fostered in her is considered highly inappropriate as the future wife of an up-and-coming officer and she is sent to a “bride school.” There, in a posh villa on the outskirts of town, Hanna is taught how to be a “proper” German wife.