Time and place of action - 20th century, Earth: the huge Siberian Republic, created by the legendary Ermak Timofeevich. Before us is a world in which familiar and mythological realities are intricately intertwined. Science and magic coexist peacefully. A steam locomotive and an airplane do not exclude the philosopher's stone and the magic crystal. The main characters of the novel belong to the powerful and proud “i-chu” - the Monster Slayers. Without them, not a single country in the world will survive, they enjoy many privileges, but they have many enemies. Too much. The “last i-chu” - Igor Prishvin - enters the battle with them.