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.

Stepan and the Cossacks continue to save the tsar, facing new obstacles during the Time of Troubles, while Mnishek and Nazar step up their game to change history. In the future, Churila, Pop and Amira face a new reality and confuse the police more and more.