When Susan (Dunne) moves with her father (Frank Morgan) from America to England, she ends up falling in love with and marrying Sir John Ashwood (Alan Marshal), an English baronet. But, before their son is born, Susan loses her husband to World War I. When World War II breaks out years later, her son's own tour of duty begins. Finding out whether he will return home safely or not makes for some of the most dramatic moments in motion picture history