Claude Makovski

Diquet (Claude Brasseur) is a private investigator. Usually, he just follows people around and records what he sees them doing. His latest case becomes progressively stranger. After he is hired to follow a man's young mistress, the detective finds that her journeys begin to tie into his own life -- to episodes dating back to World War II, and to certain of his friends who are dead. (Allmovie)

Charles and Lucie, old couple without much money, are land a notary who tells them they have just inherited a luxurious house in the South France, a car and rent money placed in Switzerland by a distant relative recently passed away and unknown.To receive the inheritance they must first pay the notary advanced. To do this they are required to sell all their belongings before leaving to the south and to realize, at a house that does not exist, that have just been scammed. (Wikipedia)

Marc and his gang have a brilliant idea (or so they think!) : they will kidnap Vénus de Palma, a (very) rich heiress. Well Venus, also known as Cookie, is duly abducted but holding the lovely twenty-year-old beauty is a horse of another color. Cookie is indeed both seductive and intelligent and manages to seduce one member of the gang after the other, pitting the ones against the others... The brilliant idea soon proves a nightmare! (imdb)