Out of love for his adoptive mother, Carl Brenner allows himself to be accused and imprisoned because of an illegal operation carried out by Doctor Stefan Brenner, the legitimate son of Mrs. Brenner. A few years later, Stefan died of alcoholism and Carl made a name for himself under his name.

Follenfant, father of a large family, completed late military service. He looks a lot like the commander who is shy and thanks to this resemblance, Follenfant who is also a ventriloquist, makes his superior and his own happy by marrying the widowed seamstress and mother, too, of a large family.

Ferdinand is an honest and almost prude chemist at the Fourageot laboratories. His boss, Mr Fourageot, is mostly busy with his mistresses but comes to be worried with his young and outgoing daughter.

Brothers Moïse and Salomon run a modest bazaar near the Butte Montmartre, under the sign of "everything for nothing". There are office items, perfumes and leather goods. Their niece, the beautiful Lia, twenty years old, a graduate in synthetic chemistry, lives under their roof. She is less close to her pennies than the old grigous, and willingly visits the store "Aux femmes françaises", administered by the very Christian Valois family, where she hopes to place products. of its creation; perfumes, make-up and ointments of all kinds.

Dora Nelson, a famous actress, leaves both her husband Philippe de Moreuil and the role she was playing in a movie directed by Nivert, to follow her lover Santini in Italy. But she soon realizes that Santini deceives her with a girl named Elsa. In vexation she decides to return to her husband and to her career. Unfortunately for her, Suzanne Verdier, a little working girl, has in the meantime replaced her not only in the film she had left unfinished but in her husband's heart as well. Dora eventually understands she must step aside.

On one side, a crooked banker, his nephew and his orderly; on the other, the honest friend of the banker and his daughter. Substitution of male and female characters that end with two marriages.

Two twin sisters, nieces of the mayor of Buissons-les-Amours, are, one very wise, the other evaporated. The lover of the second falls in love with the first whom he will marry after being forgiven for his conduct.