From fairy tales we know what was long ago, but what was long ago? The three heroes will have to find out the answer to this question, even though they did not ask it. Then it started to happen! Gorynych suddenly finds a dinosaur, and Alyosha Popovich with Prince and the horse Julius literally fall through the ground. Now it is urgent to figure out how to bring them back to the future. And most importantly, to find out who or what is the mysterious Top of the Earth.
