Two boys fight on a beach while a VO evokes the origin of his violence, arising from childhood and fear. Two adults separate the boys and one of them, the most violent, is put in a car, tears in his eyes. We find the same boy, Nathan, years later, around age thirty, just as he’s about to leave for Germany with his students, along with another teacher. They are going to Weimar to visit Buchenwald. Nathan is also supposed to pick up some documents from a German contact, Yann Lachmann, for his thesis. But he’s met by a young woman named Gaby instead, he falls head over heels in love with her and they sleep together the same night. The next day, along with the students and the other teacher, they take an emoGonal tour of Buchenwald. But what strikes Nathan most is the picture of a prisoner standing behind the camp doctor named Wagner: this prisoner is his own father’s spiIng image. Once back in Paris, he starts to look into the unknown man, telling his father about his discovery in the restaurant where they meet every Wednesday for a lunch of calf’s liver. But his father, Adrien, barely reacts to the news, seems to find it trivial. A simple resemblance.