A young girl sees the theater in which her parents play burn down, and they disappear in the fire. Twenty years later, the orphan girl, who has become an actress, is summoned by a director who wants to remount the play and offers her the role of her mother on condition that she finds the text. Immediately, and as if by magic, the father, like the ghost of the opera, reappears and dictates his conditions for access.

Making a film about a radio station doesn’t sound like the most visually compelling of projects. How many takes do you need before the acoustic transition from the opening to the closing of a door is perfect or the reader's voice correctly modulated? Nicolas Philibert has accepted the challenge to portray that which cannot be seen. Shouldering his camera, he spent half a year wandering the endless corridors of Radio France’s ‘round house’ on the banks of the Seine where he filmed people who dedicate themselves utterly and meticulously to their work.