Four murders in forty-eight hours happen in Nice. The murderer calls himself "The Exterminator" and the police are unable to catch him. Tom Lepski is an insurance detective and he get involved in the investigation when Liza Mendoza, a famous violinist and a friend, is killed just a few minutes before Tom visit her. After another rich woman killing, Tom finds out that all the victims were members of the exclusive Fifty Club. All of them but Lisa.

Clara Bell is a busy Euro MP with a husband and child at home and a high powered career - but on a trip to Paris her ordered existence is overturned by a murder and a chance encounter.

Auguste Maroilleur, an elderly farmer, exploits 400 hectares of crop land with the help of his family, over which he rules with an iron hand. Things go awry the day he discovers one of his grandsons is involved in drug traffic. To make matters worse, the reckless youth has hidden the white powder in the Maroilleur farm. Without a moment's hesitation, Auguste gets rid of the toxic substance but, of course, the mob has different views...