Camille (Audrey Tautou) works evenings as an office cleaning woman, and makes graceful drawings in her free time, living in the attic of a Parisian apartment block. Philibert (Laurent Stocker) is a young, aristocratic history buff living - temporarily - in an apartment lower down, part of the estate of his late grandmother. He has let out part of it to up and coming cook Franck (Guillaume Canet), a gruff young loner and womaniser with a genuine love for his frail grandmother, Paulette (Francoise Bertin). When Camille falls ill, Philibert insists she stay with the two of them so he can look after her. And even though she and Franck clash, the trio manage to live together and learn from each other.
