Full spoilers for the investigation and its outcome.
The file that gives the film its name concerns Guillaume Girard, a teenager who was struck during a chaotic Yellow Vest demonstration in Paris and left with a fractured skull and life-changing injuries. Stéphanie Bertrand of the IGPN is assigned to determine whether the force used was legitimate. The film's engine is not whodunnit in the classic sense but whether the apparatus will permit an answer at all.
The turn that reframes everything is not a twist of plot but of position: Stéphanie discovers that the injured young man comes from her own hometown, and the family is connected to the world she left. From that point the dossier can no longer be handled at arm's length; every procedural decision carries a private charge, and her professional neutrality becomes a discipline she has to impose on herself rather than a natural state.
What Moll withholds, deliberately, is the satisfaction of the genre. Stéphanie's investigation runs up against the structural defences of the institution — accounts that align, equipment and conditions that make individual identification difficult, footage that shows a great deal and establishes little, colleagues who regard her inquiry as betrayal, and a hierarchy for which closing the file cleanly is itself a result. Critics summarised the film's thesis in a phrase that became its signature: bad apples are merely born from their rotten systematic tree. The film's own summary of its heroine is equally blunt — she champions justice and can't please anyone.
The retrospective meaning. On reflection, several things the film seemed to present as neutral procedure reveal themselves as the actual antagonist. The anonymity of riot gear is not an accident of uniform design but the precondition of impunity. The interview room, which appears to be where truth is collected, is where competing versions are equalised into statements of comparable weight. The title itself is the cruellest joke: a young man's ruined future filed under a number, and a number is a thing that can be closed.
The ending therefore lands not as a revelation but as a recognition. The audience, having been kept exactly level with the investigator throughout, arrives where she does — holding a complete, competent, honest piece of work, and understanding that completeness, competence and honesty were never what the system required. What lingers is Drucker's face at the close of the process: not defeat exactly, but the specific fatigue of someone who has learned the limits of her own integrity.