A truck driver crashes into a group of pilgrims. What appears to be a fatal accident develops into a sensational murder case - and what seems to be the aftermath of a power struggle within a cult has its origins 30 years earlier in German-German history, leading Inspector Karin Krafft, supported by the wise owl, straight from the deep West to Erfurt in Thuringia. There, the daughter once betrayed her greatest enemy to the Stasi - it was her own father. Refined revenge, betrayal of the betrayer, or late atonement - the solution to this equally moving and remarkable case can be found in the Lower Rhine region between Wesel and Xanten, Kevelaer and Moers, Dinslaken and Hamminkeln.