Having reproduced the 12 danish caricatures that angered muslims all around the world, Philippe Bal, head of Charlie Hebdo, the french satirical newspaper, is prosecuted. An extraordinary trial followed by Daniel Leconte in real time. To understand it are key actors, international, ideological and mediatic challenges. With, on film : lawyers, witnesses, media, staff meetings, manifestations of suspport. Also with the positions taken by thinkers and politicians, the prosecution’s reaction along with that of muslim countries. A reflection on Islam, on the press, on the state of opinion in french society but also an attempt at responding the challenges set by integrationists in any democracy.