A Parisian couple decides to sell an unsanitary basement in their building. A very ordinary, nondescript man, Mr. Fonzic, shows up to buy it. Nothing unusual there, until the man moves into the cellar and makes it his permanent residence. The couple tries desperately to cancel the sale but to no avail. Worse, Mr. Fonzic becomes a threat to their family as he befriends their teenage daughter on whom he seems to exert a perverted influence.
as Jacques Fonzic
as Hélène Sandberg
as Simon Sandberg
as David Sandberg
as Maître Rivière
as Le proviseur
as Amos
as Justine
as Nelly Sandberg
as Grand-père Gérard
as Jérémie Sandberg
as Olivier Sandberg
as Luka Steiner
as Maître Massard
as Maître Carole Vasquez
as Monsieur Leroux
as Monsieur Martini
as Noémie Bouvier
as Monsieur Lefèvre
as Madame Lefèvre
