Sister Kalistrata was killed!...
There is no other explanation for the sudden death of the young devout woman—so the fellow pilgrim friends Svetlana Atrazekova and Yulia Shatova believe as they begin an investigation. Theft from the monastery safe of twenty million rubles, the “commercial” activities of the hieromonk who leads a comfortable secular life outside the church, theft of the sisters’ personal belongings— the veil of secrets of the “monastery courtyard” collapses. Besides, the police deliver an indisputable verdict: the nun was indeed poisoned, and this is only the first victim in a chain of terrible crimes… However, investigator Sergey Bystrov is convinced that evil penetrated the sacred walls from the outside, and that in the monastery there is an accomplice working for a well-coordinated criminal group. And she seriously threatens Svetlana’s life—the woman he seems to have been looking for all his life.