It is 1940s coastal Lincolnshire, and Carolyn Holmes is keen to do what she can for the war effort. Raised on the family farm, she battles with her mother to further her education, although nothing is too good for her brother. Phyllis Carter, a bitter widow from the Great War, lives close by with her son, who works on the farm. When Peter decides to volunteer, a distraught Phyllis blames Carolyn, who leaves to join the ATS where she meets Beryl. Carolyn and Beryl are posted to Beaumanor Hall in Leicestershire as ‘listeners’, the most difficult of signals intelligence gathering.

September 1939. London is in blackout; war has been declared, but Dulcie Treadwell can think only of American broadcaster, Glenn Reeves, who didn’t say goodbye before leaving for Berlin. Heartbroken, Dulcie is posted to Bletchley Park, where she must concentrate instead on cracking the German Enigma codes. The hours are long and the conditions tough, with little recognition from above. Until she breaks her first code. But when a spiteful act of jealousy leads to Dulcie’s brutal dismissal, her life is left in pieces once more. 

When Jess bumps into Milan unexpectedly, sparks are reignited, and she wonders if she made a mistake finishing with him in Amberton. But matters are complicated when a film company arrives at Bentley Priory to make a morale-boosting film about the RAF. The lead actor is none other than Leonard Steele, a man from Jess’ past who could ruin everything she has worked so hard to build. 

May, 1941. Meet the Air Raid Girls: three young women keen to do their bit during the Yorkshire blitz. Connie's life has taken an unexpected turn since her husband died - she's living at home and working in the family bakery - but night shifts as an ARP warden give her a firm sense of purpose. Her younger sister, Lizzie, is eager to play her part, too, perhaps as an ambulance driver. Twenty-year-old Pamela has led a sheltered life, but when her family's home is destroyed in a raid, she must learn to stand on her own two feet - helped by new friends. 

Lady Joanna Harcourt and her daughter, Sarah, discover their life of luxury at Goodwill House is over. Because with Lord Harcourt away fighting, the Harcourt girls are facing financial ruin. Lady Joanna is terrified of losing their home, but for Sarah, this means her dreams of becoming a doctor are over. Headstrong Sarah isn’t one to quit! War or not, she’s determined to find a way to save her home and follow her dreams - whatever it takes.

Sunderland, 1940, and the women go to the shipyards to do their bit for the war effort. Polly never dreamed she would be able to work in the shipyards like the men in her family but times are tough and her new job ends up giving her more than she ever expected when she meets enigmatic dock diver Tommy Watts. During the day, head welder Rosie teaches her fledgling flock of trainees their new trade, but at night she hides a secret life. And mother hen Gloria signs up to escape her brutal husband, but finds she cannot run....

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.... 

Mary Vale, a grand and imposing Mother and Baby Home, sits on the remote Fylde coast in Lancashire. Its doors are open to unmarried women who come to hide their condition and find sanctuary. Women from all walks of life pass through Mary Vale, from beautiful waitress Emily, whose boyfriend has vanished without trace, to young Isla, cast out by her wealthy family after her first year at university goes horribly wrong. Awaiting them is Nurse Ada and Sister Anne who work tirelessly to aid the mothers and safely deliver the babies. 

London, 1942. Charlotte Fenimore is back home on a week's leave from the Women's Auxiliary Airforce. She had planned for a week of rest and recuperation. She hadn't planned to fall deeply in love with an irascible detective called Dan Chalmers, a wounded hero of Dunkirk who believed no woman would ever look at him again.

April 1940. Violet Millington, is ready to rediscover the joy of living. As she waltzes into the Palais, to begin her new life of boosting morale in war swept London, she must leave her family's sorrow behind her. But soon Violet discovers she's not the only one with something they're running from. Violet quickly befriends gutsy American Nancy, the diamond of the dance hall, flame-haired Renee with her enviable foxtrot, and Temperance, who must overcome her bullies to achieve her dreams. 

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.... 

Life as an ATA pilot is tough, but despite the long hours and danger, Ellie can think of nowhere she'd rather be. Not only does she love flying, but doing important war work, alongside new-found friends, provides a welcome distraction from worrying about loved ones fighting on the front line. Being an ATA girl is definitely exciting but, as Ellie soon finds out, wearing the distinctive blue uniform also means putting her life on the line every time she takes to the skies. 

1915. After the recent dramatic events at the Home Depot, Milly Woods is looking forward to spending as much time as possible with her post office girls, Nora and Beth - known as Liza to her friends. With Christmas fast approaching, their job of getting millions of letters and parcels to the troops on the front line is more important than ever. But when Milly is moved to a different department, she and the girls struggle to find time to spend together.

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. 

Norfolk, 1940. As war rages on, sisters Prue and Thea, along with the wider community of Great Plumstead, are doing all they can to help the war effort, from running the mobile canteen for the Women's Voluntary Service to organising clothing drives and collecting salvage. When, Anna, a young German girl who fled her country, seeks refuge at the local hall, Thea opens up her home, Rookery House, and invites Anna into their growing family. But while many in the village welcome Anna with open arms, others are suspicious of the new arrival.