Russian Special Forces officer Alexei, while on a business trip in Syria, is blown up by a land mine and ends up in the 18th century, in the body of an "undergrowth" - the fifteen-year-old son of the landowner Yegorov. Alyoshka, assigned according to the traditions of his time to the guards regiment and already had a non-commissioned officer rank, lives in the parental estate, and he needs to wait more than a year for his first officer rank. At this time, the Russian Empire is waging a fierce war with the Commonwealth and the Ottoman Empire. Father Alyoshenka, a retired Elizabethan officer, gives him his fitting, a trophy he brought after a seven-year war with Prussia. It is with this rifled and long-range weapon that the young non-commissioned officer Lyoshka Egorov goes to the first Russian army on the Danube.