They appear suddenly and disappear suddenly. Black cloaks, hoods with red borders, hot horses, shooting carbines without missing a beat, well-aimed arrows. No one speaks out loud about these people living somewhere in the remote taiga, for fear of causing trouble. Warriors of the Faith—that’s what they’re called. The most desperate of them, a mysterious girl named Eupraxia, increasingly began to appear where Alexey Polyakov, a detective police agent, arrived. He is trying to find a trace of ancient church books stolen from a famous collector - and all attempts to find out anything are stopped. There is no doubt that Eupraxia and her brothers in faith were somehow involved in the disappearance of the books. But it is not yet possible to penetrate the veil of severe secrecy with which the warriors of the Faith have surrounded themselves...