A man is alone in Paris during the month of August while his woman and children go on vacation. He meets a young English girl posing as a model who came to Paris for a shoot.

A gambling countess comes by a secret three card combination that wins her a fortune, but she is allowed to use it only once and not gamble again. She passes on the info twice, and the recipients both die violently. She is warned that if she passes it on again, she too will die. Many years later, a young soldier discovers that the countess has the secret, and he resolves to get it out of her.

Young boxer Michel Maudet is sacked by his manager after a series of match defeats and is forced to look for a new job. He is engaged as secretary to a millionaire named Ferchaux who is in a hurry to flee the country when he discovers he has been implicated in a high-profile fraud.

A bank clerk is drawn into the risky world of a gorgeous gambling addict.

Charles-Edmond, the eldest of the Larmentiel brothers, decides to return to La Rochelle, his hometown to die there. Forty years earlier he had been driven out by his father. Before passing away, the old eccentric announces that he has a hidden son, Émile, a fisherman to whom he wishes to bequeath his property. François, the younger brother, whom Charles-Edmond hates, is eyeing the inheritance to bail out the powerful family business, a veritable fishing trust, and will try to appropriate the affection and property of this inopportune heir. Émile, meanwhile, is too busy arguing with Fernande, a beugland singer, to suspect what awaits him...

Sylvain, a suave, witty player as well as an accomplished writer and Genevieve met 10 months ago. He wanted a serious relationship for the first time so they moved to the country so they could be together and he could write.

A businessman who lives from blackmailing begins to be blackmailed by his own wife who hates him.

Arlette has too provincial parents to whom she announces her plan about own independence. After her departure, Marc, her absent fiance seek for her in vain in Paris until he discovers her picture on the magazine cover.

Dr. Cordelier, living in a suburb of Paris, withdraws from society to pursue research into the functioning of the human brain. His lifelong friend, Maître Joly, becomes concerned when Cordelier draws up a will that bequeaths his entire estate to a stranger, Monsieur Opale; he cannot understand why Cordelier defends him, considering Opale attacks women and children. After a colleague is killed, Joly confronts Cordelier and discovers the truth behind his friend's behavior.

Unbeknownst to the members of a French family, a radio announcer makes them the subject of a broadcast.