Mathias Herz is found beaten to death. Small glass shards in his head wound are puzzling. The victim's wife, Lara Herz, is shocked by her husband's death. According to her statement, he had no enemies. However, he and his childhood friend Karsten Wollmer had apparently recently had an argument about the financial direction of their jointly operated climbing park. But is that really the motive for the murder? At the same time, a completely different lead emerges...