It was written by Arnošt Vašíček and directed by Jiří Strach.

The pair of police investigators Petr Sumara and Lenka Šímová investigate a case of a serial killer in the environment of the Prague lodge of freemasons with the help of religionist Michal Runa (Ivan Trojan).

(millions) The series was shot in various locations of Prague and Znojmo.

Filming was also done, for example, in the Prague subway, under the Čech bridge, by Motolské potok, in the Prague sewage treatment plant or in the Vyšehrad casemates.

[5] This Czech Republic television show-related article is a stub.