The teacher Odile Langlois starts her new job in the elementary school of a small French town. She is elegant and mysterious - but most of all, she is very friendly to her new students, whose confidence she gains so quickly. On the contrary, however, Odile's unconventional, alternative way of teaching does not appeal to some colleagues and parents who do everything to get rid of the young teacher ...

Raphaëlle n’en revient pas, elle a été virée de son poste d’animatrice des écoles parce que son obésité ferait peur aux enfants ! A Pôle Emploi, Raphaëlle est confiante : elle a un diplôme, une expérience professionnelle, tout va bien. Et pourtant même discours frontal : aucune chance de retrouver un boulot si elle ne maigrit pas… Pas question ! s’indigne Raphaëlle. Mais la réalité la rattrape, sa situation se dégrade et c’est un véritable combat que va devoir mener Raphaëlle : un combat pour sa survie et le droit d’être qui elle est.

France, 1940. German troops have just invaded the country, but in the rural idyll of the family chateau inhabited by 20-year-old Mellie with her impoverished aristocrat father Alexandre and adolescent cousin Robinson, the war still seems far away, apart from the fact that Mellie's rich and unpopular fiancé André has been drafted into the army. For Robinson and his friends the same age, including the temperamental Bertrand, the war is merely a game they play in the remoteness of the blue island in the lake.