London 1940. The war is raging across Europe and twenty-three-year-old Grace is devastated by the loss of her husband Brian at Dunkirk after only a year of marriage. Her secretary job at a law firm keeps her mind from dwelling on her sorrow but when her boss James enlists in the air force Grace is left without work. Alongside her best friend Helen the two young women join the War Office in a move that will change their lives forever. As Grace throws herself into the war effort she must find the courage and strength to start her life over and find love again.