August 1940. The war is raging in Europe but on the home front conflict still seems far away. Dot living with her mother-in-law and dreading the day that her thuggish husband comes home on leave is fighting her own battle to contribute to the war effort. Peggy has found confidence as an Air Raid Precaution Warden despite the jeers of the men she works with - but beneath her pluck she fears for her close-knit family scattered by the war. And glamorous Vivian the former debutante is running away from her own heart and into danger as a volunteer ambulance driver. Then the bombs begin to fall over London and all their lives are turned upside down. Thrown together into an unlikely friendship can the Blitz Girls protect their country - and each other - in the darkest hour?