After failing to help evacuee siblings whom she witnesses being separated, May wishes she’d had the confidence to speak up. When Jess suggests a pantomime to boost morale on the station, May is desperate to help - but is held back by her own insecurities. With her low self-esteem also affecting her relationship with Squadron Leader Peter Travis, May is fed up with being her own worst enemy and decides to take charge of her destiny. But the past she ran from, plus a crisis with one of the evacuees, throw May into the midst of a drama that will test all of her newfound confidence. 

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. 

Mabel has finally put the past behind her, and her relationship with the dashing Harry is stronger than ever. That is, until an old flame shows up, leaving Mabel questioning her future. Meanwhile Joan has made amends with Bob - if only she could do the same with Gran. And there's still that family mystery she wants answer to, isn't there? As a mother and grandmother, Dot Green has always put her family first. Her job as a parcels porter has brought new purpose to her life, so is it finally time to start following her heart.

December 1943. As the war effort gathers steam in Europe, it's all hands on deck on the home front. Gloria is over the moon to be reunited with her sweetheart, Jack. But her sons, Bobby and Gordon, are away with the Navy and still know nothing of their mother's divorce and new half-sister. Rosie's squad of welders must work gruelling hours in the yard as they prepare for the Allied invasion of Normandy. All the while Rosie herself waits anxiously for news of her husband, Peter, who is carrying out dangerous work as an undercover operative in France.

London, 1940. After her fiancé breaks off their engagement, Evelyn decides to do her part for the war effort by signing up for construction work on Waterloo Bridge. Grieving after her little boy dies in an air raid, Gwen is completely lost when her husband sends their younger children to the countryside for safety. Enlisting as a construction worker, she is partnered with cheerful Evelyn. The two women strike up a heartwarming friendship. 

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.

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. 

London 1917. As the Americans enter the war, there is renewed energy in the war effort.  With husbands and sons fighting for freedom, the women of Harpers are left to tackle the day-to-day affairs at home and work. With Ben Harper away, Sally fears she is being followed by a mysterious woman. Who is she, and what does she want? Maggie Gibbs collapses seriously ill in the frontline hospitals and is brought back to England close to death. Can she be saved, and what does the future hold for her and her broken heart? 

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.... 

It’s 1943, and the district nurses have two new recruits. As the country ramps up for D-Day, the new nurses are getting to know their patients on their patch in London’s East End. Lily is quite sure of herself and doesn’t believe she has anything new to learn. She’ll find out the hard way that anyone can be made a fool of when she meets a man who promises her everything.

Yorkshire 1944. The end of the war feels tantalisingly close, but Air Transport Auxiliary girls Bobbie, Viv and Mary have plenty more flights in their beloved Spitfires yet - battling everything from snow to enemy fire on their journeys. Risking their lives doing their bit for their country, this Christmas they're determined to have some festive fun. But as they set about bringing good tidings for all, a stern and mysterious new flyer in the form of Peggy arrives. What secret is Peggy hiding?

October 1942. Viola loves her new job away from the factory and hopes that her romance with the handsome Ralph might have a happy ending. Meanwhile, married life is proving tough for Fran and Davey. Following her husband's shocking confession, Beth finally feels as though she's regaining control of her life. Christmas is a time for family and friends, and the factory girls will do everything they can to ensure this year's celebration is one to remember.

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. 

1939. When the man Georgie has always loved is sent to France on a secret mission, every knock of the door fills her with dread. Beth is determined to do her bit for the war effort. Caught up in a whirlwind romance, she marries only to become a war widow. Desperately trying to make her way back from Paris to her family in England, a fateful and tragic encounter brings Hetty to Chateau de Faubourg, where she joins the resistance.

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.