Mr. Catignac, a pork butcher in Perigueux, plans to marry Victor, his son, to the daughter of a magistrate. What he does not know, for his son does it in hiding, is that Victor writes songs and has made his debut as a singer in a cabaret. To make matters worse, the young man has a mistress. When word of it leaks out, the whole family are outraged. One night, as Victor goes back home, they are all here, waiting for him.
Arlette thinks she has made a wonderful gift to her daughter Sylvie, who has just married François Morel, a young journalist. And, to tell the truth, not everybody receives a posh little bar like the Royal Montmartre as a gift. The trouble is that Monsieur Jo, the former owner of the joint is also the boss of a gang of drug traffickers. And that he has managed to persuade the pair of naive lovebirds to drop a painting to a friend on their way to their honeymoon place. Now the picture is stuffed with drugs! The honeymoon trip promises to be eventful...
Elisabeth D'Anthar cheats on her husband François with Simon De Chabre. François, who suspects something, surprises his rival and wounds him. Elisabeth 's sister, to save the situation, claims that Simon is actually in love with her and came to see her. They have to get engaged and Simon breaks up with his lover. But Elisabeth is not prepared to accept it, and she becomes the head of a gang of "drivers" in order to kidnap her husband. Famous Vidocq intervenes.
