A local inspector and a French police officer investigate a body found floating in the Scheldt.
A troop of scouts arrives at Warnaffe for their big summer camp. Among them, the newest member of the Coyotes patrol, Kevin, a rebellious and lonely boy. From the first evening, he leaves to find something to smoke in the neighbouring village. There he meets Marie with whom it's love at first sight. They spend the night by a lake in a quarry. The next day, still under the influence of drugs, Kevin dives into the lake, discovers a cave, diamonds and a corpse of a young man. This is where problems started.
Jules, 18 years old, reluctantly spends his holidays in the naturist campsite of his childhood. He is torn between his attraction for the beautiful Karim, a seasonal worker on the textile beach, and the depression of his mother Adèle, who refuses to let him grow up.