Célestine, an ordinary elderly lady living in an ordinary block, has a problem: whenever she looks out of the window she catches sight of a white car that troubles her. Not the car itself, an ordinary Citroen DS 19 car, but the unusual way its driver uses it: it keeps going round the traffic circle below at every time of the day and of the night, day after day, night after night All the time. Round and round, it goes, unceasingly.