What can happen in the dead of night if you are lonely and unhappy? Be afraid! Because the demon Bosorkun may come to you on this dark night. The demon, who has risen from ancient Slavic legends, however, will give you the opportunity to understand the events of past centuries, will allow you to plunge into the tragic and disastrous moments of the past, and will show you the Pekelnoe kingdom of sinners. And all this just to delay the end of the world?!