It is 1939, and working-class Evie Bishop has received a scholarship to study mathematics at Oxford when tragedy turns her life upside down. Evie must seek a new future for herself and, inspired to contribute to the war effort, joins the Women’s Auxiliary Air Force as an Ops Room plotter. Posted to a fighter station on the Sussex Coast, Evie befriends two other WAAFs. But the German bombers seem to know more than they should about the base’s operations, and soon Evie, May and Jess are caught up in a world more dangerous than they ever imagined.

In a different world, Evie Milton would have accepted her fate, married an aristocrat and become the doyenne of one of England’s finest estates, just like her mother. In a different world, Rose Wiley would have married her fiancé, David, established a modest homestead and brought up a brood of babies, just like her mother. But this isn’t a different world, and these women are not their mothers. Rose dreams of a life filled with more than family and duty to her husband—a life of purpose—and Evie dreams of a life far away from her rarefied existence.

At the heart of Dover's Market Square lies the Castle's Café. A bustling, homely place run by the formidable Nellie Castle and her six children. Since the scandalous birth of her beloved son 10 years before, Marianne, Nellie's eldest daughter, has preferred to stay in the kitchen, hidden away from the town gossips. Overcome with shame, Marianne has never revealed the name of Donny's father - not even to her own mother. But with World War II just around the corner, Marianne's past catches up with her. And suddenly the lives of the Castle family become a lot more complicated.

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.

When an impossibly shy young woman named Judy Morgan finishes her studies in Physics at Cambridge University, it is with dreams of changing the world for the better. Meanwhile, a beautiful, young Jewish woman decides to flee her beloved Austria, changing her name to Hedy Lamarr, and risking everything to get to America, as far away from the Nazi threat as possible.

In enemy-occupied Paris, as the locals go to bed starving and defeated by the war, music and laughter spills through the door of a little restaurant, crowded with German soldiers. The owner, Marianne, moves on weary feet between its packed tables, carrying plates of steaming, wholesome food for the enemy officers. Her smile is bright and sparkling, her welcome cordial. Nobody would guess the hatred she hides in her heart. That night, the restaurant closes its doors for the final time.

1938, Salzburg. Johanna, Birgit, and Lotte Eder have always lived quiet lives, working in their father’s clockmaking shop and helping their mother in the house. But like many other Austrians, they find it impossible to ignore the changes in the world around them. At first Johanna finds it hard to believe the Nazis pose a real threat. But then her father hires Franz to help in his shop. He’s kind and soulful, with dark eyes that twinkle with intelligence. But he’s Jewish, and as Johanna falls for him, she realizes that loving him puts them all in danger.

Nineteen-year-old Libby moves to Berlin to escape her suffocating family - but instead of offering freedom, the city is under siege by the Nazis. Jewish books are burned, storefronts smashed and every day innocent people vanish into thin air. Libby cannot - will not - turn a blind eye. When Libby meets Harro, she knows there’s more to him than his dazzling smile and cornflower-blue eyes. The whip marks on his back, scars from the SS, tell his true story: He is a resistance fighter.

Berlin, 1936: From her beautiful new home Liesel Scholz barely notices the changes to the city around her. Her life is one of privilege and safety thanks to her father’s job working for the new government. But soon a chance encounter with Rosa, the daughter of their Jewish housekeeper, leaves Liesel in no doubt that something isn’t right. Frankfurt, 1946: An idealistic American captain, Sam Houghton, arrives in Germany to interrogate prominent Nazis on trial and to help rebuild a battered country. He hires an enigmatic and damaged woman named Anna as his interpreter.

London, 1941. The Blitz. When a Royal Navy memo arrives at head office, requesting female recruits to sign up as motorcycle dispatch riders, delivering highly classified orders across the country, three women jump at the chance to sign up for the most dangerous jobs in London.

Paris, 1939: The Nazis think Éliane can't understand German. They’re wrong. They think she’s merely cataloging art in a Louvre museum and unaware they’re stealing national treasures for their private collections. They have no idea she’s carefully decoding their notes and smuggling information to the Resistance. But Éliane is playing a dangerous game. Does she dare trust the man she once loved with her secrets, or will he only betray her once again?

As the German Luftwaffe begin a terrifying bombing campaign that will come to be known as the Blitz, thousands are evacuated to safety. But Lizzie Mackenzie finds herself heading toward London. She knows she must help in the war effort. But she has another reason for leaving the security of her Scottish village: the illegitimate child she gave up for adoption nearly five years before is somewhere in the city. And - as the bombs rain down - she will stop at nothing to find her and make sure her little girl is safe.

France, 1942. At the end of the day, the schoolteacher releases her pupils. She checks they have their identity passes and warns them not to stop until the German guards have let them through the barrier that separates occupied France from Free France. As the little ones fly across the border and into their mothers' arms, she breathes a sigh of relief. No one is safe now. Not even the children.

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.

It's not just a thousand miles that separates Hanna Majewski from her younger sister, Stefa. There is another gulf—between the traditional Jewish ways that Hanna chose to leave behind in Warsaw, and her new, independent life in London. But as autumn of 1940 draws near, Germany begins a savage aerial bombing campaign in England, killing and displacing tens of thousands. Hanna, who narrowly escapes death, is recruited as a spy in an undercover operation that sends her back to her war-torn homeland.

Scarred by his experiences in World War 1, German doctor Sebastian Braun lives a quiet life tending to his patients and his beloved garden. Until Sophie Hathaway bursts into his life and challenges his dearly held beliefs. And just at the moment Sebastian discovers love for the first time, war is on the horizon once again, threatening not just his peace of mind. As the Germans approach the Channel Islands, Sebastian has to make choices: be the peace-loving man he has become or stand up and fight for his principles?

A heartbreaking letter. A girl locked away. A mystery to be solved. 1956. When Ivy Jenkins falls pregnant she is sent in disgrace to St Margaret's, a dark, brooding house for unmarried mothers. Her baby is adopted against her will. Ivy will never leave. Present day. Samantha Harper is a journalist desperate for a break. When she stumbles on a letter from the past, the contents shock and move her. The letter is from a young mother, begging to be rescued from St Margaret's. Before it is too late.

Sometimes the greatest dream starts with the smallest element. A single cell joining with another. And then dividing. And just like that, the world changes. Annie Harlow knows how lucky she is. The producer of a popular television cooking show, she loves her handsome husband and the beautiful Los Angeles home they share. And now she's pregnant with their first child. But in an instant, her life is shattered. And when Annie awakes from a coma, she discovers that time isn't the only thing she's lost.

1941, Poland. Though war rages around her and occupying German forces march steadily onward, 16-year-old Aleksandra has lived her life sheltered from danger. Until one day, she goes to school—never to return. Pushed roughly into a truck with other schoolgirls like her, a single ominous word tells her all she needs to know about her fate: Lebensborn.

London, 1941. The Blitz. When a Royal Navy memo arrives at head office, requesting female recruits to sign up as motorcycle dispatch riders, delivering highly classified orders across the country, three women jump at the chance to sign up for the most dangerous jobs in London.