Istanbul police commissioner Mehmet Özakin is in charge of serious crime, mainly murder investigations, mostly in the Turkish metropolis. A very modern Turk, he uses up to date Western methods, without prejudice, assisted by bachelor Mustafa Tombul. Even his private life is progressive, his wife Sevim being on the former imperial capital's university staff.

Johann and Mustafa appear on television to set an example of successful integration. However, the television appearance goes awry because a dispute breaks out in front of the camera. And because Johann hasn't been paying any rent for months, Mustafa wants to throw him out of the house...

Johann Stanzerl sees himself surrounded. All other business premises in his Viennese district are already in Turkish hands. Only his beloved café "Prinz Eugen", named after the famous general who prevented the Turks from taking Vienna, is still resisting with its regular Austrian customers.