This film deals with the contrasts of the Wilhelminian era in Berlin: the splendor of the monarchy, the economic and intellectual vitality of the up-and-coming imperial capital on the one hand, and the misery of the proletarians in the tenements on the other.
In this film, Humbert is on the trail of his own history. Wolfsgrub is the name of the house where Humbert's mother lives, and though she is getting on in years, she becomes young again as she answers her son's questions.
There is something bizarre going on at the Hartcourt Academy for boys and girls. All the students are vanishing left and right under mysterious circumstances and no one except the new girl, Susan Galligan knows what has become of them because she is having visions that students are the victims of violent murders!
What are Ilona Herfurt and her boyfriend Dietmar Freistrath doing in the old mine? Where does the money come from that her son Jimmy finds under the newspaper? Where have the unique and intricately carved works of art, often passed down for generations, disappeared to from the village in the Ore Mountains? What do the carver Gerlach and his foster daughter llona have to do with it? Questions upon questions that are burning under the detective's nails.