The first half of the 17th century. The Great Time of Troubles swept across Rus', and for a while it was unclear whether the Russian state would remain on the map. But even in the hardest hour, the new Tsar Mikhail Romanov and his closest circle did not stop thinking about the future of Muscovy. And they regarded the development of the richest lands beyond the Urals as the most important undertaking. Into newly opened expanses went bands of daring Cossacks and trade expeditions. Fearless pioneers built forts and trading posts, laid routes, and founded cities. And the Russian state grew ever larger, gaining new, wealthy Siberian lands. For centuries!..