Sylvain Maro, inspector of the Paris police, is considered one of the best police officers of the French capital who dreams of serving in the special forces. After finding out that he slept with the Commissioner's wife, he is transferred to municipal police of Marseille, whose mayor is the former Commissioner Gibert. While chasing a taxi driver, he ends up drowning the patrol car and as a result enters into a skirmish with the city police.