Pavel Petrov-son of Remezov... a researcher, candidate of sciences, was in the past in the body of a young boyar from the medieval Smolensk wilderness as a result of a successful experiment. It seems that everything could have been worse, thank God - at least not in smerds and not in slaves, but there are a full circle of envious people and intrigues in the person of the nearest neighbor and "brothers," who have long been licking themselves on Remezov's lands. In addition, some magi appeared in the nearest forests, and fires are blazing throughout the patrimony, strange and inexplicable murders are taking place. From the twenty-first century to the thirteenth... but how back? True, there is one way - to enter into resonance with one of the most successful Mongolian commanders - Subedei. However, will it work? It was also lucky - at the end of 1240 - very soon the invincible tumens of Batu will begin their famous western campaign - to the last sea.