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...!
| Actor | Role |
|---|---|
 RaimuCélestin / Floridor | Célestin / Floridor |
 Janie MarèseDenise de Flavigny | Denise de Flavigny |
 André AlermeMajor Alfred | Major Alfred |
 Edith MéraCorinne | Corinne |
| AAlida RouffeCaroline | Caroline |
| MMarguerite GuérauThe extern sister | The extern sister |
| JJean RousselièreLieutenant Fernand de Champlatreux | Lieutenant Fernand de Champlatreux |
 Michel DuranOfficer | Officer |
| SSuzy LeroyGimblette | Gimblette |
 Anthony GildèsBishop | Bishop |
 Édouard DelmontDirector of the music hall | Director of the music hall |
| PPierre DarteuilOld handsome | Old handsome |
 Mady Berry(uncredited) | (uncredited) |
 Edwige FeuillèreTheater lover (uncredited) | Theater lover (uncredited) |
 Géo ForsterOfficer (uncredited) | Officer (uncredited) |
| AAndrée LorraineTheater lover (uncredited) | Theater lover (uncredited) |
 Marcel MaupiMachinist (uncredited) | Machinist (uncredited) |
 Jean RenoirMaster sergeant (uncredited) | Master sergeant (uncredited) |
 Viviane Romance(uncredited) | (uncredited) |
 Simone Simon(uncredited) | (uncredited) |