All that remains of the famous Otroch Monastery in Tver is the Assumption Cathedral and endless dungeons in which some terrible secret is hidden. For many centuries, young Chosen Ones have been trying to penetrate the secret of the labyrinth under the monastery. The last of them was found dead right in the crypt of the temple. Guardian Daniil Naryshkin and the strongest magician-artifactor Eva Kurakina are sent to the site to investigate this mystical crime. The secret of the Otroch Monastery is closely connected with the past of Eva’s family. Now the girl must find the criminal, reveal all the secrets and save the ancient treasure...