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.

1942. Evie Sinclair has enlisted in the ATS to serve her country. Her mother disapproves, wanting her to stay and help run the household, but her father supports her bid for independence. Though conditions are austere and the training is intense, Evie is proud to become a qualified gunner girl, part of the team operating the anti-aircraft batteries. When she meets RAF bomber pilot Matt Goodwin at a dance, it's not long before they fall in love. But then tragedy strikes. Matt is killed on a mission, leaving Evie bereft - and expecting a child.

As war rages, Barbara Sinclair is desperate to escape her unhappy home life. And with the threat of German bombs ever present, Barbara reluctantly agrees to marry John, her childhood friend, who is leaving to join the RAF. But an encounter with Alex Everton, a dashing Spitfire pilot, complicates matters for Barbara. With emotions running high, she begins to question whether she has made a terrible mistake. With the constant threat of death all around her, Barbara must try to find a way to deal with the complexities of her difficult home life and her emotional relationships, too.

When duty calls, East End girl Minnie Wolton isn’t afraid to do her bit. She’s excited to be joining the ATS girls and although she knows life at the barracks will be tough, she’s not one to quit! She just hopes the other girls are all good sorts. With her husband away fighting, Eileen Ruffel is glad of the break from her unhappy marriage. She just wants to make a success of the ATS girls and maybe find happiness too. Along with the other girls, Minnie and Eileen strike up a firm friendship. The training is hard, but they are determined to prove they are the best new recruits.

Berlin, 1938. Samuel Weiss and Max von Hofmannsthal were best friends until the cruel antisemitism of Nazi Germany seeped into Berlin and tore their friendship apart. As Max rises in the ranks of the Nazi SS, Sam and his Jewish family find themselves simply struggling to survive.

Pearl has given up on her dreams of being a journalist after being denied a promotion because of her gender. Joining the WAAF as a radio telephone operator for Bomber Command, Pearl's new job at RAF Fenthorpe serves two purposes – providing an income for her grandmother, and keeping a close eye on her younger sister, Thea, an instrument repairer at another Lincolnshire bomber station.

21-year-old Alix is studying in Paris, far away from Sasha, her Serbian father and Leonora, her English mother, as World War Two breaks out. Finding hope even in troubled times, romance sparks with fellow student Raoul; but she soon learns young love can be tumultuous. So, when Steve, a handsome American pilot with Serbian ancestors, enters her life, she can't ignore her feelings toward him. And making a decision will be even harder as both men leave for war.

The occupation has taken much from the Cotillard sisters, and as the Germans increase their forces in the seaside town of Boulogne-sur-Mer, Gabriella, Martine and Simone can’t escape the feeling that the walls are closing in. Yet, just as they should be trying to stay under the radar, Martine’s discovery of a British messenger pigeon leads them down a new and dangerous path.

England, 1940. Opening the box with trembling hands, she couldn’t believe it–a tiny baby lay inside. She gently lifted the newborn as it started to cry. Cradling the little one to her chest, she searched the darkness for any sign of whoever left it here. And as she rocked the child, something fluttered to the ground...a ration book.

It was the day that changed everything. When the Nazis came and broke into our home. Destroyed everything that was safe for us. They took our home and our security. I thought it couldn’t get worse. But then they also took my sister. After that day nothing was the same again. I thought I’d never see her again. I thought she was lost to me forever. I joined the Resistance, vowing to fight against the evil German army with every last spark of fire in my body. I know what I have to do. And nothing can stop me.

Berlin, 1944. ‘No! Not my child!’ Annaliese screams, her voice breaking as she pounds the window uselessly. But no-one looks up as the man in the SS uniform cradles her precious baby and strides away. She lies unmoving on the threadbare cot, her throat hoarse from long hours of screaming but her tears keep falling. Her heart has been cleaved in two, now the Nazis have taken the only thing she has left–her child. She is utterly powerless against them. But as Annaliese cries herself to sleep, she makes a vow—she will find her precious baby again. Whatever it takes.

Everything changes when Lilou is given her most important task: to keep a frightened little boy, Eliot, hidden safe in her farmhouse. All alone in the world, Eliot refuses to speak as he clutches his treasured children’s book close to his chest. Inside is a beautiful story of stars, planets and the night sky. But why is this innocent child the one, among thousands, who Lilou must save?

Paris, 1943. German soldiers drag me out onto the cobbled street and push me toward the waiting truck. I force myself to face forward as tears stream down my cheeks. If I look back, they’ll know. I can’t let them find my baby girl....

When Nazis break down the front door of 18-year-old Trudi’s home and seize the Jewish couple hiding in her attic, she’s devastated, and is suddenly solely responsible for their two innocent children. The whispered rumours about the resistance are her only hope. A man called Frans and his cousin Piet risk their lives every day helping scared and abandoned Jewish children escape into the countryside. Under the cover of night, she races to beg for their help.

When Sophie Weiss boards the SS St Louis, she has no reason to stay in Germany. The Nazis have taken everything from her, and her only hope is escape. But when she meets fellow Jewish refugees Rosa, Hannah and Rachel on board, the friendship they form gives Sophie hope that there can be happiness in her future, after all.