London 1941. Sirens warn of danger as German bomber planes approach the city. Ever cautious, Kathy and her mother head immediately for the nearest public air raid shelter, and when the building is destroyed in a direct hit, it is a miracle Kathy survives. Finding herself alone, Kathy is left with nothing but a burning fury and a determination to join the war effort. 

October 1943. Nancy Dalton, working at the RAF base at Scampton in Lincolnshire, has been holding vigil for the Lancaster bomber pilots whose missions seem endless. But her watchfulness has not prevented her own pilot brother from failing to return. In the midst of mourning him, fresh recruits arrive to continue the war effort, among them charismatic Canadian Steve Allard. The months ahead will be long and hard, with danger a constant companion, and although both Steve and Nancy never intend to complicate wartime life with romance, their attraction becomes impossible to ignore. 

Christine Banner is alone after her father's death. Determined to make her own way in the world, she stumbles onto an estate in the New Forest where she finds work that she loves. However, when the future looks uncertain, Christine's skill at handling some of the large and difficult warhorses shines through and captures the attention of the son of the estate owner. In the face of grief, sadness and disappointment, Christine's intelligence and strength will be tested until she finds the place she can truly call home.

London, 1940. The war is raging across Europe, and 23-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 Grace joins the War Office in a move that will change their lives forever.

Major Harry Sterling has had to leave his regiment after the death of his father and brother. Now Duke of Ranliegh, it is his duty to marry without delay. His friend Captain Atterton makes a surprise appearance, and the men are drawn into a web of treachery. Someone is supplying secrets to Napoleon, and Harry also discovers that his brother did not die in an accident, but was murdered. The investigation proves dangerous, and the elderly duchess is fearful that her grandson will be killed before he has produced an heir.