Ivan, a junior researcher in the sector for the study of magic by the Koshcheevs, was sorting through the archives. He had already sorted everything out, but he just couldn’t find the end of the most ancient fairy tale, which told why Tsar Koschey became immortal. Therefore, he had to go back in time to the kingdom of Koshcheevo, find out how Koschey became immortal, and when he returned, finish the fairy tale.