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.

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? 

At the heart of Dover's Market Square lies the Castle's Café. A bustling, homely place run by the formidable Nellie Castle and her six children. Since the scandalous birth of her beloved son 10 years before, Marianne, Nellie's eldest daughter, has preferred to stay in the kitchen, hidden away from the town gossips. Overcome with shame, Marianne has never revealed the name of Donny's father - not even to her own mother. But with World War II just around the corner, Marianne's past catches up with her. And suddenly the lives of the Castle family become a lot more complicated.

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.

1940, London. When Cordelia accepts the post of head librarian in Silver Town Library, her mother is more than a little disapproving. The East End has high levels of poverty and illiteracy, and her mother says it’s no place for a woman of her status. But Cordelia is determined to make a difference in these times of strife, and along with her colleagues, Jane and Mavis, she begins to help the local community, making sure everyone knows what the library can offer them. And maybe even a romance will blossom.

Kitty Wilson, who, after losing her father, rejects the unsuitable suitor her mother has chosen. Abandoned by her mother, Kitty faces the challenges of navigating life alone. Amidst the turmoil, Kitty finds solace and support from friends, securing a promotion at Harpers Emporium. However, tragedy looms, threatening to shatter her newfound stability. Sally and Ben Harper face their own challenges. A decision by Ben regarding the restaurant, made without consulting his partner Jack Burrows, jeopardizes not only their friendship but also the stability of Harpers itself.

Matriarch Kitty Conlon is missing her son Patrick, proud but fearful of the fate of his Spitfire, while spinster Mavis welcomes a new lodger, WAAF Anna Carswell who is delighted by the Weaver Street welcome after a loveless childhood. At number nine, Maggie Stubbs worries nightly as her daughter Lily patrols the streets to protect the neighbours during air raids in her role as ARP Warden, and when an unexploded bomb is discovered at the allotment, danger comes terrifyingly close to Weaver Street.

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.

October 1940. Twenty-three-year-old Bobby Bancroft is working as a typist for a city newspaper, but she longs to be breaking the news herself. When she successfully applies for a junior reporter role at The Tyke, a magazine serving the Yorkshire Dales, she's thrilled – even if she only gets the position because so many men are away fighting. Bobby moves to the sleepy village of Silverdale, but she quickly discovers life in the countryside is a different world.

Kitty and Tom Conlon arrive in Liverpool in July 1916 to claim the house Tom’s great-uncle has bequeathed him in his will. The move to England couldn’t have come at a better time. Dublin is in turmoil following the Easter Uprising and Kitty’s brother is now in prison. The house in Weaver Street is all they hoped for, and after a shaky start with her new neighbours, Kitty believes the world is her oyster. Until that is, Tom is conscripted into the navy. With Tom away, it’s up to Kitty and the women of Weaver Street to get each other through the war.