
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.
Genres:

François Cluzet as Jacques Fonzic

Bérénice Bejo as Hélène Sandberg

Jérémie Renier as Simon Sandberg

Jonathan Zaccaï as David Sandberg

Martine Chevallier as Maître Rivière

Jack Claudany as Le proviseur

Antoine Levannier as Amos

Victoria Eber as Justine

Denise Chalem as Nelly Sandberg

Patrick Descamps as Grand-père Gérard

Ambroise James Di Maggio as Jérémie Sandberg

Sacha Attal as Olivier Sandberg

Sharif Andoura as Luka Steiner

François-Eric Gendron as Maître Massard

Laëtitia Eïdo as Maître Carole Vasquez

Patrick d'Assumçao as Monsieur Leroux

Éric Génovèse as Monsieur Martini

Candice Bouchet as Noémie Bouvier

Jean-Claude Frissung as Monsieur Lefèvre

Nicole Gueden as Madame Lefèvre
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