Gianni, a young man, a common man, after years of rejection, meets for the first time his son Paolo on a train bound for Berlin. Paolo is fifteen and has serious diseases, but he is generous, cheerful, exuberant. This is the story of a brief, unexpected happiness: getting to know one another and discover one another far from home. Their stay in Germany and then an unplanned trip to Norway brings father and son into a relationship made up of clashes, mysteries, joy...