Inside a flat in a residential building, a young girl is practicing J.S.Bach's Little Prelude in D-minor on the piano. After she finishes playing the piece, we are successively transported into five neighbouring flats where the sound of the piano has simultaneously penetrated. In each of theses spaces we meet a single occupant in a characteristic, solitary activity that unfolds in exactly the same time-frame as the performance of the prelude and sends its own acoustic signals to the adjacent spaces. The five private monologues are thus interconnected, their narcissistic pathos and obsessive isolation injecting a dissonant counterpoint to the tenderness and lyricism of the musical composition.