A man who has just deposited a will with a notary is run over by a car. As his overcoat bears the name and address of Emile Blondin on a label, the police go there and discover that the dead man is not Emile Blondin. But this one is soon discovered murdered. The police then became interested in Georges Blondin, the victim's brother, whose goddaughter, Juliette, was also the notary's secretary.

Endive-Meunier, a prosperous silk dealer from Lyon has an affair with his secretary he tries hard to keep secret. One day, he nevertheless accepts to accompany her to the seaside resort of Coeur-sur-Mer. Unfortunately for him, once there, he finds himself in the presence of Claudius Paquito, the popular barman of a fashionable club. The trouble is that the man is no other than one of his former employees he once fired for insolence...

A married industrialist maintains three mistresses. On the instructions of his wife, the tax inspector seizes the small notebook where he records his illegal dealings. After a stormy marital explanation, the industrialist decides to reduce his costs by getting rid of his mistresses and expresses the intention of returning to legality. But he realizes that everyone, even his wife, prefers the old situation, fraud and mistresses, thanks to which everyone found his little profit.

Schomberg, an enigmatic psychiatrist runs a nursing home. He is forced to close his clinic and disappear to escape the police. But he wants revenge on his wife's lover, Didier Laurent, a former RAF fighter pilot. Didier meets a young trapeze artist, Paula, with whom he falls in love. The happiness of the two young people is disturbed by the assassination of Irene, strangled by Schomberg who casts suspicion on Didier. Fortunately for them Commissioner Ulysses knows the truth and forces Schomberg to commit suicide.