Who tampered with the climbing harness of businessman and amateur photographer Willi Stolzer, causing his fatal fall? Who assaulted the managing director of Stolzer Company? Who released the safety of the fixed rope during the fall exercises on the Venediger Glacier? And who is hiding behind the gambler named Magermilch? Fanni learns this, observes that. When the individual clues finally come together to form a pattern, it is almost too late.