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.

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.

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.