A small village is torn apart by a quarrel between the baker and the italian grocery tenant, mother of a pregnant young girl. She accuses the baker's son, doing his military service in Algeria, to be the father of the would be child. Offended, the baker refuses to deliver bread to the villagers standing on the mother's side.

The Bontemps family, like all the inhabitants of the village of Coussy la Chapelle, are passionate about radio. Coco, the fiancé of Jacqueline Bontemps, participates in all the contests and under the name of Mr. Bontemps wins a beautiful Sunday. All arrive in Paris and in the premises of the Parisian Post Office attend popular broadcasts.

Gaston Bernod is a Parisian bus driver. Honest, upright and hard-working, he is held in high esteem by his superiors. Gaston has always pampered "his" bus, going as far as to equip it with a fuel-saving device of his invention. Very close to his vehicle, he may have somewhat neglected his wife Paulette, who lets herself got round by the smooth words of Pierrot. The gigolo has indeed managed to persuade her to follow him to the Mont Saint-Michel, "a wonderful nest for their burgeoning love" as he says. The trouble is that Gaston, while driving his dear 84, catches sight of the car, and suddenly aware of his misfortune, sees red. He immediately sets off in pursuit of the culprits, involving his load of helpless passengers in the chase.

Panorama of the programs and hosts who made the heyday of radio in the 1950s.

Augustin, the bashful but model secretary of Fontange,a tyrannical industrialist, is desperately in love with Christiane,his boss's daughter. Of course Daddy will never allow. On the contrary he wants to force his daughter to marry his business partner, a single man, whose money would be a welcome help. To escape such an unfortunate lot, Christiane must find a subterfuge. The solution is Bichon, the baby that Jacques, her younger brother, is supposed to have had from a certain Loulou. By claiming that the baby is hers and that Augustin is the father, she hopes to compel her father not to marry a man she does not love.