Working on excavations, two history graduate students, Ivan and Ekaterina, couldn’t even imagine that, by the will of ancient forces that they had unknowingly awakened, they would end up in the 15th century—right in the middle of very complicated events. And not only that: in the bodies of Ivan the Younger, the son of Ivan III, and Caterina Sforza, respectively. In this time, even local residents struggle to survive—so what can we say about representatives of the 21st century?