This film is set in a medieval mill town in the Harz mountains. The greedy and brutal millman and his accomplices, the castle steward and the mayor, set fire to a forest mill that the farmers used for processing their grain. Without their mill, the farmers must now rely on the millman's services. When the farmhand Anna uncovers the millman’s crimes, he swiftly detains her and a young miller, Jörg. The forest spirits have a different plan, however, and they free the young couple with the charge to rebuild the ruined forest mill and turn things around for the villagers.

Eva Kotthaus
as Anne

Hans-Peter Minetti
as Jörg

Willy A. Kleinau
as Mühlmann

Werner Peters
as Schulze Bangebös

Gerhard Frei
as Burgvogt Raufer

Heinz Kammer
as Ratte, der Kriegsknecht

Johannes Arpe
as Schmied Anselm

Marianne Rudolph
as Marthe, seine Frau

Jupp Stauder
as Knecht Konrad

Gertrud Paulun
as Magd Marie