Paris by night. Nathalie is twenty. She flutters through life with the grace of a noctural butterfly, as if no one and nothing can reach her. Far from the gaze of others and the lights, she sells her body for a few crumpled bank-notes. Tof protects his sister with all the love he can muster, the absolute brotherly love that gives Nathalie the strength to go on. They're two kids lost in life. Like characters in a play by Brecht, they have tragically ordinary lives as they struggle with life's problems. Pierre, a shoemaker, disturbed by Nathalie's world, will have the experience of a rare and precious encounter. He meets her at the Select Hôtel, where the rooms, with their paper striped like prison bars, conceal the poetry of an underground world.