Tsar Ivan the Terrible wounds his son to death after a fight — just like in the famous painting by Repin. To undo what happened, the Tsar attempts to travel back in time using a magic spell book. However, things do not go according to plan, and the Tsar ends up in our times, where he meets the Osipov family. Nikita Osipov is an unlucky archaeologist and a struggling father. He has divorced his wife and lost touch with his son and daughter. Now they must find the spell book so that the Tsar has a chance to save his son. And so, the adventure begins!