In 1914, in the first months of World War I, Louise Jarraud loses her husband, killed on the front. Shortly after, she gives birth to a baby, who soon dies. Devastated by this double misfortune, Louise decides to dedicate her life to caring for the children of others. She becomes a nurse with several employers, giving her affection to little boys or girls. A widower and another man propose to her but she refuses twice determined as she is to live only for the children in her charge.

Louise Jarraud est profondément et définitivement marquée par un drame qui a bouleversé sa vie pendant la Première Guerre mondiale. Elle a, en effet, perdu coup sur coup son mari et son fils. Depuis, elle consacre sa vie aux enfants des autres. Devenue gouvernante, passant d'une famille à l'autre, elle a élevé Frédéric, Gérard, Charlotte et Daniel, qu'elle considère presque comme ses enfants.