Albert Millaud

A convent organist and music teacher escorts a young woman who has been boarding there, home to be married, but romantic complications ensue.

Célestin, the organist of a convent, has written and composed a light operetta under the name of Floridor. One day, the Mother Superior asks him to chaperone one of the boarders, Denise de Flavigny, who is returning home to get married. Now, Denise, for all her goody goody looks, soon proves as saucy as can be. Things get even more complicated when Célestin starts courting Corinne, the star of his operetta, to the great displeasure of a commander of dragons, the young woman's lover. Worse, the latter is none other than the Mother Superior's brother... To say nothing of Lieutenant Fernand de Champlatreux, who happens to fall in love with Denise, his fiancée that he has never seen before...!

In an all-girls boarding school, one of the students resists the will of her uncles to marry her off because she does not know her future husband. Which is why she pretends to be a prude for whom marriage is a dirty word.

Denise de Flavigny, a young convent student, discovers a double-life of the organist Célestin, who teaches her music at the convent. He secretly composes popular operettas for his mistress Corinne. Célestin visits the city to witness the premiere of his latest effort; Denise escapes the convent as well. Following a quarrel with Célestin, Corinne walks out and instead, Denise appears in her role, taking the name Mam'zelle Nitouche. Denise falls in love with Fernand, a handsome young soldier. Both Denise and Célestin are mistaken for soldiers absent without leave and shipped off to an army camp. A series of coincidences brings happiness to all concerned.

Celestin is the singing teacher in a monastery and Denis is one of her students. They both dream about the life outside. (It's a Swedish version of the famous vaudeville-opérette "Mam'zelle Nitouche").