Commissioner Oppenheimer has gone into hiding and has to get by making black market deals.
When a brutal murder takes palce in the process, his benefactor Hilde is arrested, for the dead man is her husband, SS-Hauptsturmführer Erich Hauser. Although they have been separated for years, Hilde is an opponent of the regime and therefore has a motive: unscrupulous Hauser was a doctor in a concentration camp in the east and carried out human experiments. Oppenheimer has to risk everything to prise Hilde from the clutches of the Nazi judicial system. He soon finds suggestions that a mysterious cult is involved in the murder case…