The wife of Albert Constantin goes to visit her uncle, who is sick. Albert, (Fernandel), a clarinet player with the orchestra of the Théâtre du Châtelet finds himself alone for a week. Albert finds it hard to cope, being domestically inept, and his colleague in the orchestra, Émile, (Jean Rigaux), recommends he go to see Éva (Judith Magre). He, himself, sees her from time to time. At first hesitant, Albert goes to see the woman.