Bauge, a small port town in Brittany. A large tidal power plant is being built off the coast, and the mostly Chinese workers are housed in a camp on the cliffs. When body parts are found and a woman is attacked in the park, suspicion quickly falls on the foreigners. Sergeant Ohayon, a man with a keen eye for details, is dispatched from Fleurville to reinforce the Atlantic coast. He uncovers a web of secrets and hidden alliances. And it soon becomes clear: the mood in the tranquil coastal town is shifting.