It's the height of the holiday season at an idyllic lakeside campsite in Wester France. Seventeen-year-old Camille is bored with both her family and barman Fred, her summertime boyfriend. Enter Blaise, an enigmatic forty-something, who has been hired as a sailing instructor by his brother-in-law Eddie, the campsite director. Driven by the same profound sense of discontent, which brings them closer and closer together, their passions erupt as they begin a dangerous love affair. Their complicity feeds the rumours that exasperates their immediate circle and leads them further and further away from their responsibilities.