As the war rages on, Vickers steelworks is busier than ever which is proving tough for Nancy as she juggles working long hours and looking after two young children, all while waiting for her husband to return home safely. Betty is determined to roll up her sleeves and joins the Women's Voluntary Service to keep busy and stop from fretting about her fiance. But Patty is left worrying about someone closer to home.

Sweetheart Archie has been keeping a secret from her, and one that puts him in great danger. Will it threaten to pull them apart for good? And with life at war tougher than ever, can the factory sisters rally together to find a way through?