Elisabeth is an architect, her husband is a HRD. They live in a bourgeois building. On the other side of the courtyard, an unknown man, some 40 years old, settles in an apartment. There is a piano, boxes. The man looks out the window. One day, in the courtyard of the building, Elisabeth meets the man on the piano and instantly recognizes him. These unexpected encounters provoke a surprise and even a shock in her home: man is nothing but her youthful love. From that day on, everything changes.