A dead tour guide at the grave of Goethe's sister, shortly followed by an attack on the popular city archivist! And what lies behind the mysterious clues about a previously unknown manuscript of the poet prince? For Lothar Kaltenbach, a wine merchant and musician, the peace in his hometown on the outskirts of Freiburg is severely disturbed. A first clue leads to a monastery that no longer exists. But Kaltenbach has no idea that he is already being watched...