A homeless man is found dead on Graz's Schlossberg hill. Tour guide Tony Blauer becomes entangled in the mysterious crime and soon finds himself drawn into the world of the "Sandlers." Together with his British friend Duncan, he attempts to solve the case. A long-forgotten secret comes to light and leaves its mark on Graz and its history.

The delightful light operatic farce by Johann Strauss is presented at the Morbisch Lake Festival (Seefestspiele Mörbisch) starring Herbert Lippert, Richard Samek, Heinz Zednik and Dagmar Schellenberger.