This film is absolutely exceptional, from all points of view: story, actors, director, cinematography, everything. If you like movies with action in prisons, this is the best of all. And the most realistic (the script is inspired by a true story). Although static, because all the action is taking place in a prison cell, the film has great tension and is watching with the soul to the mouth. Michel Constantin and Philippe Leroy in their best roles. Great, great film!