At the foot of the Cyclopean wall below the cow barn, a dead man is found. He is 53-year-old entrepreneur Dr. Stefan Schüppel, who runs a long-established company for cosmetic products with herbal extracts in Rathmannsdorf. Initially, there is no indication of murder, especially since Dr. Schüppel had documented episodes of depression. Suicide seems likely. However, the longer Leo Reisinger and Sandra Kruse investigate, the more suspicious the man's death becomes. For exactly 20 years ago, he had an accident while climbing at the same spot.