Is love possible between forty-year-old losers - a road worker Mars and a never-married librarian with the strange name of Elfa? And if possible, does it have a chance for the future? But from the ceiling of the apartment where Mars had just moved, a chandelier falls with a bounce ... What is this a technical sin of Khrushchev's communal construction or a sign of fate? Furiously pushing the bell button on the apartment from above, Mars still does not imagine what awaits him outside this door...