New York, present day: On a whim, Juno Lambert buys a 1931 Underwood typewriter that once belonged to celebrated journalist Cordelia Capel. Within its case she discovers an unfinished novel, igniting a transatlantic journey to fill the gaps in the story of Cordelia and her sister and the secret that lies between them. Europe, 1936: Cordelia's socialite sister Irene marries a German industrialist who whisks her away to Berlin. Cordelia, feistier and more intellectual than Irene, gets a job at a newspaper in Paris, pursuing the journalism career she cherishes.

1940, Italy. Lili and Esti have been best friends since they first met at university. When Esti’s son Theo is born, they become as close as sisters. While a war seethes across borders, life somehow goes on—until Germany invades Italy, and the friends suddenly find themselves in occupied territory. Esti, older and fiercely self-assured, convinces Lili to join the resistance efforts. But when disaster strikes, a critically wounded Esti asks Lili to take a much bigger step: To go on the run with Theo. Protect him while Esti can’t.

Spring 1946: Best friends Vera Frankel and Edith Ban arrive in Naples. Refugees from Hungary, they managed to escape from a train headed for Auschwitz and spent the rest of the war hiding on an Austrian farm. Now, the two young women are starting new lives abroad. Armed with a letter of recommendation from an American officer, Vera finds work at the United States embassy where she falls in love with Captain Anton Wight. But as Vera and Edith grapple with the aftermath of the war, so too does Anton, and when he suddenly disappears, Vera is forced to change course.

Berlin, 1933. Aspiring actress Clara Vine arrives in Berlin to find work at the famous Ufa studios. Through a chance meeting, she is unwillingly drawn into a circle of Nazi wives, led by Magda Goebbels. British Intelligence officer Leo Quinn sees Clara as the perfect recruit to spy on her new elite friends. But then Magda reveals to Clara a dramatic secret and entrusts her with an extraordinary mission.

Brzeziny, Poland, 1939. Zofia's comfortable lifestyle overturns when her husband, Jabez, who monitors Nazi activity, has gone missing. Rather than fleeing the country with her young son, as she had promised Jabez who is fearing retaliation, she decides to stay. She cannot possibly leave her friend, Aanya. Since their childhood they have amazed fellow Brzeziners that it does not matter that Aanya is Jewish and deaf, and that Zofia is Catholic and hearing. Now, more than ever with war looming, Zofia will do whatever is necessary to protect her family and Aanya.

Liverpool, 1935: Raised in a strict Catholic family, Viv Byrne knows what’s expected of her: marry a Catholic man from her working-class neighborhood and have his children. However, when she finds herself pregnant after a fling with Joshua Levinson, a Jewish man with dreams of becoming a famous jazz musician, Viv knows that a swift wedding is the only answer. Her only solace is that marrying Joshua will mean escaping her strict mother’s scrutiny. But when Joshua makes a life-changing choice on their wedding day, Viv is forced once again into the arms of her disapproving family.

Munich, 1935. The Bavarian capital is a magnet for young aristocratic Britons who come to learn German, swim in the lakes and drink beer in the cellars. What they don't see—or choose to ignore—is the brutal underbelly of the Nazi movement, which considers Munich its spiritual home. When a high-born English girl is murdered, Detective Sebastian Wolff is ordered to solve the crime. Wolff is already walking a tight line between doing his job and falling foul of the political party he abhors. Now Hitler is taking a personal interest in the case.

It is 1943 and Sweden’s neutrality in the war is under pressure. Laura Dahlgren, the bright, young right-hand of the chief negotiator to Germany, is privy to these tensions, even as she tries to keep her head down in the mounting fray. However, when Laura’s best friend from university, Britta, is discovered murdered in cold blood, Laura is determined to find the killer.

It is the autumn of 1943, and life is becoming increasingly perilous for Italian Jews like the Mazin family. With Nazi Germany now occupying most of her beloved homeland, and the threat of imprisonment and deportation growing ever more certain, Antonina Mazin has but one hope to survive - to leave Venice and her beloved parents and hide in the countryside with a man she has only just met.

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.