Stepa learns that because of him, his direct ancestor, Yesaul, is in danger, and therefore the entire Steppe family. The Cossacks receive a dispatch from Pozharsky and decide not to go to the aid of the militia, and Stepa is thrown into a pit because of a dispute with Nazar. Ataman Markov announces the wedding of his daughter Alyonka with the Cossack Nazar.

Stepa and his friends find Yesaul Govor in captivity by the Poles, who are preparing to hang him. Nazar manages to convince everyone that Stepa is a Polish spy and he is in danger again, now from the Cossacks themselves.

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.