The story focuses on a special unit of Czech intelligence, known as the Extraktoři (Extractors). The unit operates in secret and its main mission is to ensure the safe return of endangered Czechs from abroad. The story offers insight into the world of espionage and international covert operations and is inspired by true events.

Although Czech republic is country free of rabbies, some cases of infected animals appear near one of villages in Sumava region. Virologist Pavel Rogl, that is in his thirties, has task to inspect the situation, supervise the vaccination and find the source of infection. He is also charged to elaborate an expertise for team of police detectives, that are investigating mysterious double homicide. It is possible, that murders are connected to infection. Is it a human murderer, or big beast that escaped?

The story is about a plumber, who is called Good man from the bones. He is not afraid of any work, he manages all the work he gets. Wittily responds to every situation that befalls him.