Ivan, an ordinary guy, is accidentally transported from modern Moscow to the fantastic land of Belogoria. In this parallel world, the heroes of Russian fairy tales live, magic is an integral part of everyday life, and controversial problems are solved by battles with heroic swords. Suddenly, Ivan finds himself in the very center of the struggle between the light and dark forces, but it is not clear why, in the opinion of everyone, he is destined to play the main role in the unfolding events.