Fantastic story of the first half of the XIX century. In the monastery there is a new resident Ivan. But along with the monk, dark forces penetrate the monastery, which materialize in the person of the Legion (as he introduced himself to Ivan). The Legion chose Ivan as the object of his diabolical work, tempting him in every possible way in order to knock off his chosen way of serving God. But the stronger the temptation, the stronger the spiritual strength of Ivan.