Rosenheim district Westerndorf St. Peter: Farmer Hauser discovers a human skull while plowing. As more bones are uncovered, Roman coins come to light. The police suspect an ancient grave and involve the Bavarian State Office for Monument Preservation. The astonishing revelation: some skeletal remains can be identified as belonging to Hauser's mother, Hanni, who has been missing for years, while deeper bones actually belong to ancient individuals. Archaeologists begin a scientific excavation, as ancient Roman pottery workshops were found nearby forty years earlier. Private detective Michael Warthens and Commissioner Obermeier initially investigate independently. Shortly thereafter, Thomas Hauser is found dead. Is Hauser's murder connected to the discoveries? Michael uncovers that Hanni Hauser had new evidence of Roman settlement with a fortification and a Roman estate. This discovery would be considered sensational and bring significant attention and additional tourism to the city. The current excavation strengthens this hope among some participants, especially since much more valuable items than pottery shards are expected at the secret site. Who is after Hanni's secret and is even willing to commit murder?.