Eight colleagues fish on a mountain lake. Among them, Mehdi and Gilles drift on a separate boat. Mehdi takes advantage of being isolated to indulge. He knows that several positions will be eliminated from their teams. Then one of their colleagues falls into the water… and doesn’t go up. Then a second one disappears. There’s something underneath that’s trying to get them to the depths. The two men will do everything to reach the land. But the lake is against it.