When cities on Earth will remain cities only on the map, essentially turning into business centers... When all people in different countries will move to suburban villages surrounded by flowers and gardens... When a fast hovercraft monorail will replace smoking cars and connect cities and villages among themselves... When dragons will be bred in country nurseries... When children will happily go to school - inside villages... When people will live up to 200 years or more, without losing their vitality... Then the actions in this story will unfold about children: Yulechka and Nikita. They are not just friends, but brother and sister, living in Lesniki together with their omniscient grandmother and very athletic grandfather. Something happens to Yulechka and Nikita all the time. Either they meet amazing creatures, or they save the planet. And in any troubles they are helped by friendship, as well as the love and good advice of wise and still very young grandparents.