In 1914, while visiting her friend Madeleine, Lady Elspeth Douglas's life is thrown into chaos when war breaks out and the Germans quickly overrun Belgium, threatening France. Having just agreed to marry Alain, Madeleine's dashing brother, Lady Elspeth watches him leave to join his unit, and then she sets out for England, only to find herself trapped on the French coast. Caught amid a sea of stranded travelers, terrified refugees, and wounded men overflowing the port of Calais, the restless Elspeth—daughter of a Highland aristocrat whose distinguished family can trace its roots back to the court of Mary, Queen of Scots—decides to make herself useful, carrying water to weary soldiers near the Front. It is an act of charity that almost gets her killed when enemy shells begin to explode around her.