Goslar is in a state of excitement. Test drillings in the Gosetal suggest a new ore deposit, and many are already celebrating the revival of mining. Then, a historical Venediger mark appears in the area, indicating fraud. A geologist goes missing, and a night watchman from the Rammelsberg Museum is found dead. Ultimately, Tilla, the partner of the responsible commissioner, discovers an old manuscript from the time of Agrippa, which reports on the founding of a mining order. She suspects that a far-reaching crime is brewing over the Harz mountains. Have the dubious drilling company truly brought back the successors of the old Venediger to the Harz?.