The narrative follows Katrina, a caretaker’s young daughter who longs to see inside the ancient hilltop castle, and her older companion Fritz, who is fascinated by its history. A mysterious, resonant voice associated with the fortress addresses them and unfolds the castle’s past through legends and remembered episodes, including stories of a boy who once sang in the streets and later became notable. The work moves through connected vignettes that blend local history and folklore, emphasizing themes of charity, compassion, and the symbolic presence of a rose-bush that shapes several instructive encounters.