Stéphanie, a police officer working for Internal Affairs, is assigned to a case involving a young man severely wounded during a tense and chaotic demonstration in Paris. While she finds no evidence of illegitimate police violence, the case takes a personal turn when she discovers the victim is from her hometown.
At the end of the weekend, Louis has to say goodbye to his friend Antonin, with whom he is secretly in love. However, just a few days before his departure, Antonin prefers to flirt with Pauline, who quickly interferes with the duo. For Louis, stealing his place is out of the question. So he takes refuge in his imagination: where Pauline doesn't exist.