The most dangerous time for a winner is immediately after a resounding victory. The fanfare has not yet died down and the laurels have not faded, and therefore the clanging of the weapons of the new enemy is not heard - but he is already close. And the enemy that was yesterday will seem like a street punk next to him. Which of your recent comrades is ready to stab you in the back? Which enemy will become a friend? The trip to the Dark Ages of the Frankish state of the Institute of Experimental History instructor Sergei Lisichenko and his trainees continues. The human world is still under threat.