New adventures of the employees of the Institute of Experimental History! A new agent comes into play - martial arts master Ruslan Karkhanov, nicknamed Karkhan, under the legend of a Scythian bodyguard working at the court of Babylonian Belshazzar. Before you is an extremely unusual case about a suspicious fiery inscription that appeared on the wall banquet hall. “Mene.” Mene. Tekel Uparsin!” The time is coming! What time? When does it arrive? And in general, can one trust the translation of a clever young adventurer, impudently posing as the prophet Daniel? Karhan, intrigued by Daniel’s agility, decides to understand who he is dealing with... and comes to completely unexpected conclusions!