In Budapest, Pop and Smithey are two clowns who form a duo in a cabaret. If Pop is married, Smithey is single. but his wife is Pop's mistress. The two clowns have mutually taken out life insurance on each other's heads.

Eugénie Farnot presents herself at the agency of associated investigators. She has just inherited 200 million francs to share with three other heirs. She is afraid because for some time now she has been receiving anonymous letters.

Michel is finally on vacation in the Alps. His neighbor, Paul Hochetot, comes to him announcing that he is thinking about committing a perfect crime. He wants Michel to stop him from doing this by paying him.

While Countess Olga de Charance transports her parrot in her car, an exchange of gunfire takes place between gangsters. In the nearby bar, a body of an engineer is found.

Blanchard leaves prison, goes looking for work, but he doesn't find any. He is soon contacted by Polnic, a gangster who offers him to guard the estate of a countess.

Ariane and "The Carp" must transport a French painting to Japan. As soon as they arrive in Kyoto, a stranger tries to steal the painting from them but suspicious Ariane refuses the transaction.

In Hungary, Léa is very worried: through anonymous letters or phone calls, she is asked to end her life. Michel and the Countess will have to protect her

The associated investigators enjoy a quiet weekend in Quebec. In the hotel where they are staying, a couple who won a competition have just arrived. The couple's behavior is very strange and the hotelier reports it to the countess.

Following several bets, four friends won 240 million francs. They placed everything in a safe at the bank, locked with four different keys, each of which has one. Unfortunately, three of his friends died.

Mrs. Hansen admits to the Countess that she is a kleptomaniac and that she stole a jewel from her boss. She asks the associated investigators to enter her boss's theoretically empty country house in order to put the jewel back.

The investigators are hired as technical advisors by a film producer on the filming of Franco-Hungarian film. The Countess notices that the producer's wife is very interested in the male star of the film.

Bernard Demay wants to divorce his wife Arlette but she refuses. She contacts Olga de Charence in order to make life impossible for her husband and his mistress. The countess refuses.

Karcher entrusts, on behalf of the Lawrence family, the task of monitoring a Chinese statuette, from Paris to Montreal, to associated investigators. They quickly realize that a gang is also interested in this statuette.