1915. Best friends Irene, Maggie and Annie are proud members of the newly renamed Women's Police Service. While Britain's men are away fighting in France, the girls are doing their bit by keeping the peace at home in London's East End. But out of the blue, Irene is given the opportunity to be stationed near an army barracks in Grantham, Lincolnshire. Having recently experienced some heartbreak and keen for the adventure, she decides to go. What could possibly go wrong?

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.... 

Cambridgeshire - March 1939. As the clouds of war begin to gather in Europe, the Talbot family of rural Blackberry Farm will be torn apart, just as so many families all over the world will be. Life will never be the same again. Whilst in London, the Salmons family will feel the pain of parting and loss. Brought together by war, the two families become intertwined and, as the outlook looks bleak, they must draw on each other’s strength to fight through the hard times.

It is late 1940, and the war feels closer to home than ever for Rose Neville and her staff at the Lyon’s Teashop in Margate. The worry of rationing hangs overhead as the Nippies do their best to provide a happy smile and a hot cup of tea for their customers. When a heavy bombing raid targets the Kent coastline, Lyon’s is badly hit, throwing the future of the cafe into jeopardy. The light in Rose’s life is her dashing fiancé, Capt. Ben Hargreaves, and planning their Christmas Eve wedding. 

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. 

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. 

November, 1941. Christmas is coming... and despite the blackout, shortages and a constant threat of air raids, the inhabitants of Kelthorpe on the Yorkshire coast are determined that war won't stop them celebrating. The run-up to Christmas sees sisters Connie and Lizzie and their good friend Pamela busier than ever. Between their jobs, carol-singing rehearsals with the church choir and night shifts doing their bit as Air Raid Wardens and ambulance drivers, it's all go.

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 June 1940, and as the bombs fall the women at home must dig deep. Tucked on the edge of the Lake District lies Mary Vale, a Mother and Baby Home open to unmarried women and their children. But tensions arise when three very different women walk through the doors.

September 1941. Mary arrives in war-torn London nursing a broken heart and a painful secret. When she is offered her dream post as an assistant in the fabric department at Liberty store, she knows this is the fresh start she needs. Amid the store’s vibrant prints and sumptuous interiors, Mary finds a new family who can help her to heal. But not everyone will give Mary such a warm welcome, and the trauma of her past will soon catch up with her. As Mary and the Liberty Girls endure the heartache and uncertainty of war, it will take a steady heart to keep the magic of Christmas alive.

1941. The Blitz rages over London. And even in Cornwall, the war is being fought. When Violet loses her sister in the Blitz, she must take her nieces to safety in Cornwall. On the coast, she meets carefree chorus girl Eva, who is also running from the dangers of London. But Porthcurno hides a secret military base, and soon Violet and Eva realise there’s a battle to fight in Cornwall, too. Together with local Hazel, who works on the base, they must come together to help the war effort. But will their friendship be enough to keep them safe? 

1949. Peggy and Able Ronoscki's seaside cafe in Devon is thriving, and their twins, Fay and Freddie, are growing up fast. To pursue her daughter’s destiny, Fay must train in London and Peggy is faced with a dilemma of moving the family back to London once more. Meanwhile, Peggy’s elder daughter, Janet, has her own troubles. She fears her husband is having an affair and is desperately unhappy. Peggy is torn two ways and can only hope that a reunion with her friends at Christmas can help resolve her problems. 

Liverpool, 1939. Bella Rogers thought her life was just starting; she can’t wait to get married to her childhood sweetheart, Bobby. But when war is declared and Bobby is called up, his letters stop, leaving Bella heartbroken and alone. Then her family is torn apart by tragedy when her angelic 5-year-old sister dies from a terrible illness. They can barely afford a funeral, but the church is packed with the entire community, devastated for their loss. Grieving for her sister and lost love, Bella finds a job at the Bryant and May factory, making matches.

When Frankie’s mother dies, she is sent to live with her aunt Bet in Worthing, Sussex. Life on their farm is happy - for a while. But when World War Two breaks out, Frankie must help her country by signing up to the women’s branch of the British Army. Soon, she meets Romare, an American Doctor who has come to the UK after facing terrible racism at home. But trouble is stirring in Britain, too, and it falls to Frankie to try to protect him. Can love triumph over a history of hate? Or will Frankie and Romare’s love pay the ultimate sacrifice? 

Alice Lake has arrived in London from Liverpool to start her training as a District Nurse, but her journey has been far from easy. Her parents think that she should settle down and get married, but she has already had her heart broken once and isn’t about to make the same mistake again. Alice and her best friend, Edith, are based in the East End, but before they’ve even got their smart new uniforms on, war breaks out, and Hitler’s bombs are raining down on London.