The end of the sixteenth century. A difficult, heavy time. Russia’s western borders are torn by the Poles and the Livonians. The southern frontiers are threatened by raids from the Crimean Khan. And only in the east, on the banks of the Kama, beyond the stone—behind it—a new great kingdom opens for Rus’. But will the Cossack ataman Ermak manage to conquer it without perishing in the endless expanses of Siberia?