A knock on the door early one morning wouldn't normally be cause for concern but Kitty Williams' fiance Joe is far from home fighting Hitler with the Navy. As Kitty's heart is shattered into pieces, resolve kicks in and she signs up to the Women's Army. It's just the sort of challenge she needs and on meeting new recruits Mary, Di and Peggy, she is happy to learn that the challenge won't be a lonely one. When bombs start to fall on her home town of Coventry, and supposed allies turn against her, Kitty must find the strength she never knew she had to save her family, fix her broken heart and help her country to victory.