Leopoldo is very tall as the tallest tower in the city where he lives. Boris, on the other hand, is small as the smallest rock in the forest he cares for. A forest that, with its plants, trees and animals, is the perfect place for two people who have little in common to join to fulfill an extraordinary mission.

Can this new friendship overcome the obstacles that come their way? With a simple and funny look, the author brings us the story of these two very, very different characters who will learn that what matters is not appearances but together we can help each other.