A building, a landing, two tenants: he, Jacques Loursier, is president of the U.R.A.F (Union and Resistance Anti-Woman); she, Eliane Cahuzac, is president of the Association for the Triumph and Independence of Women. Unaware of each other until then, a cold war begins between the two parties. An attempt at conciliation fails then, after many adventures, love triumphs.

The son of the Comtesse de Brévannes dies. She, who has never wanted to meet her daughter-in-law and who wants to take care of her grandson, goes to their house under the guise of a governess.

The guitarist Moncho, singer Roberto and their impresario, arrive in Paris to find the fortune and the celebrity. They live in Montmartre in a pension that receives an impressive sampling of circus artists and music halls. They meet Maria-Rosa with whom they make a number, and this is glory.