Two fellow soldiers, who lived a long and dignified life, died and turned out to be minds in the bodies of people of the early 17th century. They are forced to actively intervene in the course of events in order to save their new lives from death, and Russia from the Time of Troubles, the distant echoes of which have reached the present day. But even having met, the friends cannot recognize each other, because now one of them is a teenage buffoon, the other is a Russian Tsar with a dubious right to the Moscow throne...