Henry Osman, born Henri Ossmann, hardly remembers his parents – not what they looked like, not what they did for a living. Zylberman has brought a pile of paper copies and is able to reconstruct parts of that childhood. The house whose address gave the film its title – and where Osman lived as a small boy – is located in the Jewish district of Paris. Re-enactments with dollhouse furniture and drawn floor plans at the former residents' kitchen tables alternate with contemporary views of the building as she re-creates this typical Paris building in the Saint-Maur No. 209 as an anachronistic space in which history is still alive, right down to the cobbled courtyard.