A young customs officer is given an important mission: to investigate drug trafficking on the Belgian border. Incognito, he goes to the place where he easily spots the gangsters.

Émile Boulard is a props man in a Paris movie studio. He has a wife, Suzanne. Or to be more accurate, let's say he HAD a wife since she left him fifteen years before, allegedly ... to go buy a post stamp. But now that their daughter Martine , who lives with her, is old enough to marry, she resurfaces. She confesses that, in order to explain his absence, she has told Martine her father was a great explorer and lion hunter in Africa. Not to disappoint his daughter, Émile accepts to pose as the adventurer he is supposed to be. At the same time he will help Daniel, Martine's bashful fiancé, not to become a henpecked husband like him.

A prompter at the Folies-Bergères and admirer of a lovely dancer, the man named Jules has the unpleasant surprise of finding, one fine morning, the corpse of his beloved in a trunk. An investigation, more burlesque than tragic, will give a lot of trouble to Jules who will have great difficulty in proving his innocence.

Our hero is the canteen man of the regiment ;with his bossy missus,as infuriating as his military superiors,he reigns ,so to speak ,over the grunts' grub. One fine day,opportunity knocks: his brother has just died;would you believe it,he made a fortune in America ,and our canteen man is the sole legatee: 100 million bucks. Overnight,his life (and his wife's ) change:not only his mates tell him stories to make his heart bleed to get some dough,but two aristocrats,a marquis and an earl,short of the readies,want the canteen man's daughter, a wise girl in love with a deserving young lawyer doing his military service,to become their daughter-in-law ,and to latch on to the girl's dowry.

Pouske runs the "Le Bienvenu" café with his wife Antoinette and daughter Jeanne. On the market square, the fairgrounds are setting up their rides and the neighborhood is getting ready to party. But Jeanne is about to fall in love with a sweetheart who has come from who knows where to cause trouble.

In the village of Sableuse, the local manor has been bought out by a nouveau riche, Emile Cousinet. When his wife Lisette, a former music hall actress, flees to Paris with young Pierre de Sableuse, Cousinet asks Father Pellegrin, the village vicar, to bring the lost sheep back home.

Florimond, a dangerous smuggler, and his mistress Viviane try in vain to transfer illegal precious stones. When Viviane gets to know young Théo, a naive young peasant, she immediately capitalizes on the encounter. Thanks to her charm, she seduces him into becoming her accomplice. And, naturally, the operation is a success. Unfortunately for Florimond and Viviane, things soon go awry. Indeed, Théo's godfather, a customs officer, who has heard of the affair, lectures Théo and makes him become aware of the offense he has committed. The young man now wants to makes amends. Which is not to Florimond's liking.

Alphonse and his wife Zulma hold the 421, a tavern in the outskirts of Lille, in the North of France. It is always full of regulars who play cards there and drink gin and exchange words in ch'timi, the local patois. But there has been trouble lately: felonies have been committed in the surroundings. So who can be those two strangers who have just rented a room each at the 421? Each sets about doing a bit of detective work.