Thirty-year old Pablo and Rodrigo barely survived a student massacre in a town in Argentine Patagonia: fifteen years before, one of their classmates entered the school and, having seized his military father's gun, fired at close range, in what represented the first Latin American school massacre. Pablo and Rodrigo never again saw the former comrade who shot them: his subsequent transfer made him invisible, and the questions he opened with his shots were never answered. Fifteen years later, Pablo and Rodrigo embark on a journey of over thousand kilometers, looking for him. To take revenge, to mete out justice? To stop dealing with the past, or to hear his repentance?