Jean-Jacques: Alexandre, a thirty-year old tailor, has decided to improve his cultural level. That is the reason why he has decided to attend an evening school. The lessons are given in the classroom of an elementary class by a teacher named Etienne. The subject of the course is : "The solitude of Jean-Jacques Rousseau". Will Alexandre become another man after grappling with with Rousseau, Diderot and ... Etienne?