Sara, a beautiful young girl with a fair complexion who could well remind us of Little Red Riding Hood, returns to an old abandoned mechanical workshop in the middle of nowhere to meet her unexpected confidant Ron Hopper; a mysterious being that has been anchored in the same place since always. From there, Ron receives with pleasure and a halo of mystery to all the souls that visit him, and that will have the opportunity to know the secrets of his existence.

The scene is set one Summer in La Ciotat, a town near Marseille which used to be prosperous thanks to its huge dockyard but has been in decline since its closing 25 years before. It is in this context of quiet desperation that a writing workshop has been set up to help a group of seven young people integrate into the world of work. Under the guidance of well-known novelist Olivia Dejazet, the participants are asked to write a noir fiction connected with the industrial past of their hometown. Session after session, one of them, a boy named Antoine, stands out. Provocative and aggressive, he gets noticed by his systematic opposition to all, including Olivia. Even more alarming, the story he has devised and that he reads aloud, the cold description of a mass murder seen through the eyes of its perpetrator, proves very disturbing. Antoine understands the killer too well. At this point, Olivia starts experiencing a feeling of attraction repulsion to Antoine.