During a solar eclipse, a mystical time portal is activated, transporting an ordinary schoolboy named Vit’ko from the 21st century back a thousand years. Vit’ko soon realizes that he is among the legendary bogatyrs: the youthful Oleshko, the mighty Ilya, and the stern Dobrynya. These heroes are engaged in a relentless struggle against the Cumans, who are determined to annihilate the Rusichi using both weaponry and dark magic. Vit’ko becomes embroiled in these extraordinary events, battling mythical beings and discovering true bravery.