On a freezing night in January 1941, a little Jewish girl is found on the steps of an apartment building in Bucharest. With Romania recently allied with the Nazis, the Jewish population is in grave danger, undergoing increasingly violent persecution. The girl is placed in an orphanage and eventually adopted by a wealthy, childless couple who name her Natalia. As she assimilates into her new life, she all but forgets the parents who were forced to leave her behind. They are even further from her mind when Romania falls under Soviet occupation.

In late March 1944, as Stalin’s forces push into Ukraine, young Emil and Adeline Martel must make a terrible decision: Do they wait for the Soviet bear’s intrusion and risk being sent to Siberia? Or do they reluctantly follow the wolves—murderous Nazi officers who have pledged to protect “pure-blood” Germans? The Martels are one of many families of German heritage whose ancestors have farmed in Ukraine for more than a century.

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.

Ava thought her job as a librarian at the Library of Congress would mean a quiet, routine existence. But an unexpected offer from the US military has brought her to Lisbon with a new mission: posing as a librarian while working undercover as a spy gathering intelligence. Meanwhile, in occupied France, Elaine has begun an apprenticeship at a printing press run by members of the Resistance. It’s a job usually reserved for men, but in the war, those rules have been forgotten. Yet she knows that the Nazis are searching for the press and its printer in order to silence them.

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.