In August 1914, as the First World War broke out and men were leaving for the front, thousands of Frenchmen were getting married. Some men, trapped in the trenches, were able to marry from a distance. But the conflict inevitably separated the couples. The lovers write letters to each other in large numbers in which they dream of life together and invent their own words... The filmmakers continue to explore the evolution of French love by interviewing various witnesses, such as Jean-Pierre Darroussin, and by editing archival images.