The Price of the Empire. Purgatory

The "Vector" project is a secret organization engaged in the study of time and the attempt to transfer the psychomatrices of people into historical figures of the past. An elderly historian specializing in the late 19th century, Mikhail Konyayev, is... being prepared for infiltration into Tsarevich Alexander, the future Alexander III. But due to an unexpected natural disaster, a temporal storm, another catastrophe occurs—a technological one. And several people are sent back in time: one finds himself in the body of Grand Duke Mikhail Nikolaevich, the second—in his son Alexander Mikhailovich. This happens at the moment when Stepan Khalturin activates explosives in the Winter Palace. History goes off the planned track.