Stepa is trying to disrupt Alyonka's wedding with Nazar, he has proof that there is a Polish spy among the Cossacks. And now Stepa, along with Ivan and Nikita, will have to pass the tests to become a real Cossack and get the right to go to the battle for Moscow. But the guys decide otherwise.

Stepa and Alyona go after the Cossack detachment. But the chieftain refuses to let Stepan into battle. Stepa does not obey and meets Nazar on the battlefield in a decisive battle.

Nazar drags Alyonka's great-granddaughter Maria into the well, and Styopa, realizing that everything happened because of him, rushes into the past to save her. In the 17th century, he learns that Susanin's feat and Monomakh's Hat, without which they cannot crown the tsar, have disappeared, and at this time Churila, Pop and Amira accidentally end up in Moscow in 2023.