Stephan, good fifty, does not believe in self-discovery, but nonetheless begins to engage with his past and that of his father. This includes "the East," which he could never really imagine. For him, everything was East Prussia or Pomerania. And what about the son his parents had to leave behind during their flight? Stephan sets out to find his lost brother. However, when he finally believes he is about to confront him, he realizes that he is not prepared for such a real confrontation with his past. In Menschenflug, Treichel once again approaches the theme of his successful book Der Verlorene.