The world-famous crime expert, Drongo, is invited to a book fair in Frankfurt—he’s asked to present to the public a scandalous book about drug dealers. But on the eve of the presentation, the expert accidentally discovers a man’s body in the pavilion restroom—with his throat cut. When the German police learn who Drongo is, they immediately involve him in the investigation. The victim turns out to be a minor publisher from Mainz. However, it quickly becomes clear that in his recent past, the Serbian citizen had participated in the war in the Balkans. Drongo is sure the crime is somehow connected to the victim’s combat past. He is also sure he will find the killer quickly. But he doesn’t know another thing yet: this time, it’s better not to look for the killer…