The year 988. Prince Volodymyr is preparing for the great baptism of Kyivan Rus. Fearing a riot, he locks in the dungeons of the Kiev magi, who turn the people against the Christian faith. Now no one will prevent baptism. But on the day of the ceremony, at the sacred moment of entering the river, the merchant Dolma dies. Fun and excitement almost ends in horror and panic. Dobryna and his neighbors manage to calm the people down and continue the baptism. Enraged Volodymyr orders to find the killer of the Christian Dolma. This is up to only one person in Kyiv - the magician Ozarov. But what did the inveterate pagan do before the death of the merchant who renounced the faith of his ancestors? However, the prince wants to know the truth, from which even the faces of the saints will turn pale...