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.

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.

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.

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.

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.

With a fake name written on the papers in her pocket, American photographer Clarisse Alarie knows the dangers of Paris better than most. Haunted by the sight of children being dragged away and carrying a photograph of the brown-eyed little girl everywhere she goes, Clarisse is desperate to make a difference. Soon, Clarisse is risking her life every day. Taking photographs of the terror that has overcome the beautiful city, Clarisse follows members of the Gestapo and hides in plain sight in order to gather evidence of their terrible crimes.

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?

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.

Born in the workhouse and adopted by a former suffragette, Frances Brakespeare was encouraged from an early age to be strong, independent and to pursue a career as a doctor. The tragic loss of the love of her life in the Great War propels Frances to commit to her one true vocation. Rebelling against the unfair treatment of female doctors Frances is dismissed from her London post and things continue to take a turn for the worse when Izzy, her benefactress dies and Frances finds herself homeless.

Cornwall, England, 1941. Gazing at the coiled barbed wire and danger signs on this once-beautiful beach, Maddie suddenly hears a frightened little cry. Her heart pounding, she races down the dunes, but knows she will never reach the child in time. Maddie Brady is overwhelmed with relief to see a brave soul ahead of her rescue a little boy trapped among the landmines on the beach. But thanking the man, Maddie is shocked to hear a German accent. Why would an escaped German prisoner of war rescue an English boy? 

Essex 1941. Unhappy with life at home with her privileged family, Hannah Austen-Bagshaw runs away to join the Land Girls Army, carrying with her a dark and terrible secret. Life on the farm is tough, but when Hannah meets handsome working-class flight lieutenant Jack, they form an immediate friendship. But unbeknownst to Jack, Hannah is sheltering a young German pilot who has crash landed in a nearby field. Torn between her duty and her humanity, Hannah knows she risks being arrested as a traitor, but she cannot see the young pilot suffer.

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....

It's 1944, and Rosie Sinclair is full of pride to be doing her bit for the war effort as a driver at Cottisbourne Park - the secret heart of Britain's fight against Germany, where a team of brilliant and eccentric codebreakers are battling to save the country. But when she's given a new mission to drive Major-General 'Bluff' Kingsley-Flynn down to Cottisbourne, Rosie finds herself on the frontline of a new battle - to uncover a possible spy at the Park who is jeopardising their vital work, and to resist her own growing attraction to the dashing Bluff himself.... 

Working in a museum under a false identity is Brigitte’s only hope. Until she meets Isabelle Valette, who confides in hushed tones that she is part of the Resistance. And when her new friend tells her of a train leaving Paris that can take children to safety, Brigitte knows her daughter must be on it, even if it breaks her heart. But getting Sophie onto the train is dangerous. If they are caught smuggling a Jewish child out of Paris, they will be killed. And with the enemy closing in, can Brigitte get her beloved daughter to safety before it is too late?