Pierre is a hotel cashier in Vichy, so shy that he answers an ad from the Psychology Institute and can't say no to the salesman, Aldo; he spends 6,000 francs on tapes, books, and a punching bag. Soon after, he's smitten by Agnes, a hotel guest with a model's looks and photographers wherever she goes. When she leaves for Nice, he follows, meeting Aldo on the way. Aldo becomes his boldness coach. Pierre gets a job washing dishes where Agnes is staying, but after a week or so, she's off to Deauville, with Aldo and Pierre in pursuit. Using funds they get by selling Aldo's car, this time Pierre poses as a polo-playing jet setter. Will this win the heart of Agnes?

Campana, a commissar at the drugs bureau of Paris police gets an undercover job in Nice to catch an Italian-French mafia boss. As he slips into the identity of a gangster's brother, who was already killed, he has to play the role of a loving husband with child - something that is not so easy for a confirmed single like Campana. Unfortunately American killers chase behind the Nice mafia clan too, in order to get control of French drug trades to USA.