You got lost during a tour in a historic mine, ending up in place nobody has ever heard of. In the tunnel of an abandoned working you find a room, whose equipment indicates that somebody used to live here... . Or still does? Is it the Treasurer from Slavic legends? You feel the time flowing and hear sounds from afar, but you are locked. You struggle to find any light source to help in search of the key. The methane detector warns you about an incoming explosion… hurry!