Julien Fermet is not made for marriage, constancy is not his virtue. Juju, Loli, Mimi - can you really remember the names of all his fleeting friends? But seventeen-year-old Audrey believes that everything will change. Fed up with voluptuous beauties, he will step towards her, the only one who truly loves him. And now, it would seem, a miracle happened. The sincere love of a pure girl melted the stone heart of a Don Juan. The victorious sounds of Mendelssohn's march are about to be heard... But Jules' turbulent past reminds itself of itself, threatening the collapse of the happy union...