1940. Two very different girls from this tight-knit community join up as ARP wardens to do their bit for the Home Front. Violet Simms lives with her controlling mother. At just twenty years old, Violet longs for friendship, love and escape. It seems that her dreams might come true until tragedy strikes on one of the worst nights of the Blitz. Grace Templeton is the eldest in her family of ten children. Spirited Grace is determined never to become burdened by child-bearing and drudgery like her mother. Adored by childhood sweetheart Jimmy, Grace believes she can do better. Volunteering as an ARP warden feels like a chance for adventure -- until she sees the horror and reality of war first hand. In the blacked-out city, she comes to realize she is less in control of events than she thought.