Where to Watch Kalter Engel (1986)

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...