Widowed early in World War II, heartbroken Helen Heaton is working in the family corner shop, trying to rebuild her shattered life. When the shop is robbed, she meets Matthew, a young police contable and he inspires her to join the Women's Auxiliary Police Corps. Despite resentment from male colleagues, Helen throws herself into the work, dealing with evacuees, the destitute and vulnerable. But a tragedy closer to home makes Helen realize there's still something missing in her life and before the war is over, she will have to choose between two very different men vying for her heart.