1942, Manchester. World War II is in full swing, and Lily Mullins is determined to do her bit for the war effort. Her friends and sweetheart have all joined up, and Lily's sure there must be a role for her that goes further than knitting socks for the troops! When she decides to volunteer for the Women's Auxiliary Air Force, Lily soon discovers that she has a talent as a wireless operator. Helped along the way by a special gang of girls, she finds strengths she didn't know she had and realises that the safety of the country might just be in her hands....

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.

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 Sally, Beth, Margaret and Rachel meet at a job interview for the wonderful new store in Oxford Street, they have no idea they will become lifelong friends. When all four girls are lucky enough to be selected as sales staff their exciting new adventure begins. Join them as they overcome heartbreak and grief, find love and happiness and remain united in their friendship, whatever life throws at them.

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.

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.

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.

Left homeless after the Exeter Blitz, May must find a job if she's to put a roof over her head and help support her two younger sisters. Taking a job as housekeeper to farmer George, May soon ends up getting stuck into more than just cleaning and cooking. The Ministry of Agriculture will close Fair Maids Farm if it doesn't meet their produce targets, but George refuses to heed their warnings. With only two reluctant Land Girls to help, May receives unexpected guidance from Dan, a neighbouring farmer, whose kindness gets tongues wagging in the village.

When Stefania Carmichael steps into the mysterious world of Bletchley Park, she immediately finds herself signing the Official Secrets Act. In whispers, she is told that she’s been recruited because of her talent for languages. Before the war ripped Europe apart, Stefania was living in Rome, charming everyone she met, and engaged to the man of her dreams, handsome and brave Matteo. And now everything has changed. With secrets swirling around the building, Stefania finds it hard to know who to trust, until she forms a close bond with two other new recruits.

Against the chaotic backdrop of World War II, Grace Murphy is working as a midwife in Doncaster Royal Infirmary with her two friends, Clodagh and Patsy. In between delivering babies and tending wounded airmen, the girls endure bombing raids, rationing and the hardships and heartbreak that war brings. But in the faces of the new babies she welcomes to the world, Grace always looks for hope, as she dreams of a time when the war will end.