Divisional Inspector Bricot sends two detectives to the French Riviera to dismantle a drug deal in a carnival mask factory. However, knowing the low efficiency of his subordinates' work, he goes down to Nice to conduct the investigation.
When the local police inspector was found dead in a prostitute's house, police division commissioner Stan Borowitz is sent to investigate the situation. Posing as the prostitute's long-lost brother "Antonio Cerruti," he discovers a mare's nest of police corruption. In fact, in this comedy thriller the whole town is corrupt. If they were closely examined, Stan's methods for pursuing this investigation might embarrass the police. For instance, he drives into a criminal's house in a fancy, expensive race car. In another incident, he callously blows up a casino owned by Musard , one of the town's crime bosses. On that occasion, he first forces Musard to remove his clothes, and the poor criminal watches his casino explode from across the square while standing naked in a phone booth. Meanwhile, Stan seduces the lovely Edmonde.
In a moment of madness a respectable pharmacist kills a young woman who is sun-bathing by a lake. When the murdered woman's boyfriend is falsely accused of her murder, the murderer is chosen to serve on the jury. Based on Francis Didelot's novel "Le Septième Juré".
In a moment of madness a middle-aged, married and respectable pharmacist kills a young woman who is sun-bathing by a lake. Unable to take in what he has done, he flees from the scene of the crime and behaves as if nothing has happened. Eventually her boyfriend is charged with the crime and, in a strange twist of fate, the killer finds himself serving on the jury.
