In the year 1183, Anna and Benedictus live happily together with their grandchildren. In the meantime, a secure wall has been built around the emerging settlement near Munich. Guarded entrance gates protect the inhabitants. However, this does not prevent the adventurous children from embarking on an exciting adventure. They save lives and find themselves in great danger. In the present day, Anna explores the remaining city gates and remnants of the old wall with her grandfather. The grandfather's explanations are enriched with legends and information about the history of Munich.