During an open day at a disused prison, a team of television reporters, a former inmate and a host of visitors drift in. Perhaps it is only a question of viewpoint : the prison warder’s, the detainee’s,... the viewer’s. Perhaps it is only a question of the medium which replaces the eye of the warder : the television camera (whether surveillance of reporting... the same ?), the camera (whether the official automatic record or that of the visitors on open day... the same ?), the colour television set. Perhaps, it is only a question of voyeurism, of reduced discernment,... of the eye; a question of image, of depth of image... of communication between inside and outside... of the cage... between us, of "screens", on both sides of the television screen.