By the will of fate, our contemporary finds himself at the beginning of the seventeenth century in the body of a real prince. Was it successful? Seems Yes. He is the Grand Duke of Mecklenburg, a famous military leader, married to a princess, and the Swedish king is his best friend. But somewhere very close, Russia, devastated by the Time of Troubles - arrogant boyars, greedy robbers prowling the roads in search of prey, thieving Cossacks supporting first one or another impostor. And there is no choice. Now he is the Tsar of All Rus', Ivan Fedorovich, but will he be able to unite the country, because every time he comes face to face with his enemies, there is someone who wants to stick a knife in his back.