Glass is transparent, the behavior of the Trier window manufacturer Jochen Staudt far less transparent. In any case, for the junior boss of the company, his father's sudden nervousness and restlessness are reason enough to hire the Berlin private detective Castor L. Dennings and give him the vague task of getting to the bottom of the cause of his father's changed behavior. Once again, a well-paid job on the Moselle beckons! The fact that his target is not a clean man is something Dennings realizes far too quickly for his taste. Staudt is a regular customer at Scheherazade, a Bitburg brothel. Just as quickly, the unpleasant, painful encounter with a snooper in the bottom drawer provides him with a possible explanation for Staudt's restlessness: the manufacturer is being shadowed. Why? Dennings can only speculate about that. Nothing is closer than the betrayed wife. The unexpected suicide of the snooper and a fatal accident on Bitburger, the federal highway 51, awaken Dennings' hunting instinct. And anyone who underestimates him and stalks his secretary Nathalie will receive his undivided attention per se. Biography Ansgar Sittmann was born on November 10, 1965 in Trier. The fact that he has become a globetrotter because of his profession and now lives in Washington DC after stays in Brussels, Islamabad and Paris is certainly due to his first stay abroad and the formative years in Fontainebleau from 1977 to 1981. The connection to his homeland is unbroken, which is why his main character, the Berlin private detective Castor L. Dennings, investigates again and again on the Moselle. Ansgar Sittmann has been happily married for over twenty years and has two children.