Three happy reservists are doing a military period. One evening out and about, thinking they were going back to the barracks, they enter a boarding school for young girls. They exchange their uniforms for the dresses of three teachers, which launches them into a series of incredible adventures for a few days.
| Actor | Role |
|---|---|
 Pierre LarqueyFélicien, pharmacist | Félicien, pharmacist |
 Yvette LebonMonique | Monique |
 Roland ToutainJacques Dancourt | Jacques Dancourt |
 Raymond CordyMr. Plume, pork butcher | Mr. Plume, pork butcher |
 Marguerite PierryDirector | Director |
| PPaul AsselinCaptain | Captain |
 Léonce CorneAdjutant | Adjutant |
 Jeanne Fusier-GirDésirée, teacher | Désirée, teacher |
| MMadeleine GérômeAlice | Alice |
 Denise GreyHortense, second teacher | Hortense, second teacher |
 Odette JoyeuxMicheline | Micheline |
| JJane LouryThird teacher | Third teacher |
 Jacques LouvignyGardener | Gardener |
 Armand LurvilleGeneral | General |
 Pedro ElviroPhotographer | Photographer |
| CClaudie de SivryCustomer | Customer |
 Marcel SimonColonel | Colonel |
| JJeanne StickSinger | Singer |
 Yvonne YmaNoémie | Noémie |