1257. A huge horde army under the command of Burundai invaded Europe. A former teacher—now the consul of Tver and of the Union of Russian Cities—is also among the participants of this campaign. Like other Russian princes, he goes along with the Mongols. He has his own plan, but will everything go the way he intended? Has he accounted for everything—or might previously unseen hidden reefs suddenly surface amid the turbulent current?! In any case, he faces a difficult path, because each of his allies at any moment can turn into a ferocious enemy.