A knock on the door early one morning wouldn't normally be cause for concern but it is 1940, Britain is at war, and Kitty Williams's fiance Joe is far from home fighting Hitler with the Navy. As Kitty's heart is shattered into pieces hearing the news she had been dreading, resolve kicks in and she becomes more determined than ever to do her bit for the war effort. Signing up to the Women's Army is just the sort of challenge Kitty needs and on meeting new recruits Mary, Di and Peggy, she is happy to learn that the challenge won't be a lonely one. But it also won't be easy and 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.