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.

Bridget Milligan has donned a uniform and joined the nursing services where she becomes intrigued with the miracles of modern medicine. She’s also torn between family loyalty, her new career and Lyndon O’Neill, the love of her life. Is it too impossible to hope that everything will come out right in the end? Phyllis Harvey is still serving in Malta where she sees the casualties of war first hand. Finally it seems like Phyllis is blessed with true in love, but fate can sometimes be a rocky road and nothing is that certain.

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.

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.

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.

After escaping the grip of the workhouse, Lily has kept her fiancé's business afloat while he is away fighting on the Western Front. Still battling on, she's now doing her bit for her country as an auxiliary nurse - but one thing above all else continues to weigh heavily on her heart: her long-lost sister. Born just before her mother died, the scandal was hushed-up and the baby spirited away. But now, at last, there is hope Lily could find her little sister for she has a clue to go on: the name of the notorious baby farmer who bought the child all those years ago. Mrs Jolley.

1939. After the sudden and tragic loss of her husband, Helen is returning home to her mother’s house in Biggin Hill, Kent - the one place she vowed she’d never go back to again. Alone and not knowing where to turn, Helen finds herself joining the local women’s sewing circle despite being hopeless with a needle and thread. These resourceful women can not only make do and mend clothes, quilts and woolly hats, but their friendship mends something deeper in Helen, too.

Housewife Nancy never dreamed that she’d end up in Vickers steelworks factory, but when husband Bert is called up to serve, she needs to put food on the table for her two young children. Betty’s sweetheart, William, has joined the RAF Reserves, so she can’t sit around and do nothing - even if it means giving up her ambitions to study law at night school. Young Patty is relishing the excitement the war brings. But this shop-girl is going to have to grow up quickly, especially now she’s undertaking such back-breaking and dangerous work in the factory.

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? 

Jane Hadley has nothing to lose when she runs away to join the Women's Auxiliary Air Force. Whatever faces her in war-torn London can't be any worse than staying at home with her abusive father. The city is nothing like she could have imagined, but she's soon on the move, travelling from base to base for her top-secret training. Making plenty of friends along the way, it doesn't take long for Jane to embrace her growing confidence - especially under the attentive eye of dashing Officer Oscar Stanton.

1950. The Second World War is over, and life has moved on for the Woolworth girls: Sarah, Maisie and Freda. In a new world, the Woolworth women have high expectations of their daughters, wanting them to seize opportunities they didn’t have themselves. Ready to take on Saturday jobs at Woolworths, budding friends Bessie, Claudette, Clementine and Dorothy are faced with unforeseeable challenges as the real world comes into focus. Their bond can only be strengthened as they overcome the darkest times. Perhaps their lives are not as clear-cut as their mothers wished them to be.

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.

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.... 

Life for Elsie is difficult as she struggles to cope with her alcoholic mother. Caring for her siblings and working long hours at Swift's jam factory in London’s Bermondsey is exhausting. Thankfully her lifelong friendship with Dot helps to smooth over life’s rough edges. When Elsie and Dot meet Millie Swift, they are nervous to be in the presence of the bosses’ daughter. Over time, they are surprised to feel so drawn to her, but should two East End girls be socialising in such circles?

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.