Maggie and her new friends Annie, Irene and Sarah come from very different backgrounds, but they've got one thing in common: they've all signed up for the Women's Police Volunteers. They can't wait to show the men just what they're made of. But soon, Maggie realises she's in over her head. Hiding her involvement with the WPV from her tyrannous father is becoming ever more difficult, and when she bumps into an old acquaintance with a big chip on his shoulder, the dangers of her new life become all too clear....

February 1942: Terrifying reports of the Wehrmacht’s advance across the Soviet Union spread like wildfire, striking new fear into the already oppressed German families living there. Harri Pfeiffer, now sixteen, is summoned to the forced labour camp in Chelyabinsk. Three years later, with the war finally over, Yvo Scholz arrives in Chelyabinsk, desperate for news of her brother. Still uncertain of the fate of her father, it takes all Yvo’s unshakeable courage to build a new life for herself. When their paths intersect, Harri and Yvo find a connection they never thought possible.

It is 1937, and Alice, Edith and Marg continue to face hardships every day, growing up on one of the poorest streets in Blackpool. Penniless, their friendship has helped them survive this far, but it'll take more than that to see them through the dark days ahead. Alice is coping with a violent father. Marg is left reeling after a dark secret about her birth comes to light and threatens to destroy the life she knows, and Edith is fighting to protect her alcoholic mother from the shame of their neighbours and keep her brother on the straight and narrow.

Alice is nursing an injured hand and a broken heart when she moves to the village of Churchwood at the start of WWII. She is desperate to be independent but worries that her injuries will make that impossible. Kate lives with her family on Brimbles Farm, where her father and brothers treat her no better than a servant. With no mother or sisters, and shunned by the locals, Kate longs for a friend of her own. Naomi is looked up to for owning the best house in the village. But privately, she carries the hurts of childlessness.

Following a humiliating experience involving the man she thought she’d marry, Iris Tredwick signs up to the Wrens in order to escape and - hopefully - find ‘the right sort’ of man to please her mother. After a bumpy start, Iris manages to befriend outspoken Mary and dreamer Sally as they are sent to their first posting - in Orkney. There she meets engineer Rob, whose flirtatious nature both charms and confounds straight-laced Iris. Much more appropriate for her is local doctor Stewart, if only she felt the same spark for him as she does for Rob.

Scotland, 1942. The Lumberjills, the newest recruits in the Women’s Timber Corps, arrive in the Scottish Highlands to a hostile reception from doubtful locals. The young women are determined to prove them wrong and serve their country – but they’re also all looking for something more. Can the Lumberjills get through their struggles together – even when tragedy strikes?

It's 1938, and Cadi is chosen to be Rose Queen in the annual Rose Fete. She is thrilled to be treated like royalty for the day. But deep down she is desperate to leave the Welsh mining community where she grew up. When war is declared, Cadi and her best friend, Poppy, see a chance to escape. Cadi leaves behind her parents and local boy Aled, whom she is meant to marry, for Liverpool.

In February, 1922, at the western-most entrance to Victoria Station in Manchester, a massive plaque was unveiled. Beneath a vast tiled map showing the lines of the Lancashire and Yorkshire Railway network, a series of seven bronze panels recorded the names of the men of the Lancashire and Yorkshire Railway who gave their lives for King and Country in the Great War - a total of 1,460 names. In March, 1940, a group of women of varying ages and backgrounds stands in front of the memorial, ready to do its bit in this new World War....

June 1940. While her little sister, Rosie, is sent to the UK to keep her safe from the invading German army, Estelle Le Maistre is left behind on Jersey to help her grandmother run the family farm. When the Germans occupy the island, everything changes and Estelle and the islanders must face the reality of life under Nazi rule.

Rhoda Middleton suspects her husband Peter is having an affair. But when Rhoda tracks the mysterious woman down, she finds she is not his lover after all, but the wife of his wartime best friend, Archie Foster. There is only one problem - Rhoda has never even heard of Archie Foster.

Bristol, 1939. School leaver Maisie Miles suspects her father, a small-time crook, has an ulterior motive for insisting she gets a job at the W. D. & H. O. Wills tobacco factory but keeps it to herself. She's befriended by effervescent Phyllis Mason and kind-hearted Bridget Milligan who take pity on her and take Maisie under their wing. But beneath their happy-go-lucky exteriors, they all harbour dreams and worries about what the future holds.

In the spring of 1942, young Elzbieta Rabinek is aware of the swiftly growing discord just beyond the courtyard of her comfortable Warsaw home. She has no fondness for the Germans who patrol her streets and impose their curfews, but has never given much thought to what goes on behind the walls that contain her Jewish neighbors. She knows all too well about German brutality - and that it's the reason she must conceal her true identity. But in befriending Sara, Elzbieta makes a discovery that propels her into a dangerous world of deception and heroism.

The day after her ninth birthday, Lucie and Blake Sullivan agree, for the very first time, to let their daughter, Grace, make the four-minute walk back home alone from a friend’s house down the street. They joke with friends about hiding behind bushes to ensure she is safe. But the joke turns sour when Grace does not appear. Despite the best efforts of the police and local community, Grace seems to have vanished into thin air. With hope fading fast, Lucie knows she can rely on her husband to support her. That is until the day she makes a shocking discovery....

Mrs. Braithwaite, self-appointed queen of her English village, finds herself dethroned, despised, and dismissed following her husband’s selfish divorce petition. Never deterred, the threat of a family secret being revealed sets off hot-foot to London to find the only person she has left - her clever daughter, Betty, who took work there at the first rumbles of war. But when she arrives, Betty’s landlord, the timid Mr. Norris, informs her that Betty hasn’t been home in days - with the chaos of the bombs, there’s no telling what might have befallen her.

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.