Writer Johannes Pfeiffer who goes undercover as a student in a high school after his friends told him that he missed out on a great life experience since he was home schooled.
Father Brown starts solving crimes, much to the annoyance of his housekeeper, the police and especially his bishop, who is not amused by a priest playing detective.
Margot is looking forward to moving into the old defense tower with her fiancé Lutz, a writer. Then the writer receives the news of his sister's death. Lutz is supposed to take in their children Traudl and Rudi and the dog Leo. Margot did not expect so much attachment...
