1610s. The terrible decade of the Great Troubles has just ended in Rus'; a new Moscow Tsar, Michael, the son of Patriarch Filaret, has finally been elected. The cities and towns of Muscovy are gradually beginning to come to their senses. And the most restless and courageous are already once again directing their gaze to the Ural Stone. There is a rich region there, unexplored lands, endless expanses, one word - Siberia. And one after another the gang leaves behind the Stone - some lightly, some with belongings and families - to look for a better life. And along with them, the servants, the sovereign’s people, looked for new lands and set up forts and trading posts for support. Young Khoper Cossacks, bosom friends Panteley Penda and Ivashka Pokhaba, also went to Siberia, having heard about the great Yenisei River, which flows from the Sayan Mountains to The icy sea, and there is no one's land there!..