Naina lives peacefully at the bottom of the sea and belongs to the people of the fish-men. Suddenly, however, she begins to have inexplicable dreams: that she supposedly has legs and that she walks instead of swims. An unprecedented storm will take her far from her home, where she will meet Almaz, another fish-man. The two young people will attempt to return to their place. And if it is true what some say, that the world was not always all sea, but there was also land? Or that even today there are places where the earth is not covered by water? The two young people are in for many adventures and even more surprises. A science fiction novel by the great author, already loved by generations of readers.