Everything accuses Boris, who takes refuge in silence. Unlike Servoz, Émilie does not believe in the full guilt of Boris, who admits to having fought with the seasonal worker – but he did not kill him! But then, who set fire to the caravan? An emergency call interrupts them: Alexia and a highly organized group have taken possession of the site at 3,000 m. They rallied the press to denounce the corruption of the town hall and the ecological disaster of the project. Émilie and Servoz rush to the spot to witness a show of force by the group of ecologists. Everyone is still unaware that the construction site invaded in a joyful disorder will become the arena of a dramatic end, a settling of accounts as much family as legal...