Lucas and Mathias, 8-year-old sons of lumberjacks in the Vosges forest, are the best of friends. One day, while driving his car, Lucas' father fatally collides with Mathias, who is cycling down the mountain. Sitting in the back of the car, Lucas watches helplessly as his father throws his friend's lifeless body into the ravine. One look is all it takes for him to realize that he'll have to keep silent about this terrible accident forever. Twenty years later, back in the area for his parents' funeral, Lucas, accompanied by his girlfriend and his best friend, runs into Mathias' father. Still wracked with guilt, Lucas agrees to go for a coffee at his place. But he and his friends will not escape unscathed...