An American family is installed in a region of France after World War I. The father, a dignitary, is involved in negotiations on the Treaty of Versailles. His wife, a devoted Christian, tries to deal with his rebellious son who has a particularly strange behavior both towards it and towards the nanny and the Professor of French. The main thing that infuriates boy is that, because of his angelic face is often mistaken for a girl. The boy knows how to manipulate their parents and has output even during formal dinners attended with their parents.