After learning that humans are headed toward his hidden home, Firedrake, a silver dragon, is joined by a brownie and an orphan boy in a quest to find the legendary valley known as the Rim of Heaven, encountering friendly and unfriendly creatures along the way, and struggling to evade the relentless pursuit of an old enemy. "El dragón Jung, la duende Piel de Azufre y el pequeño Ben buscan un lugar mítico en el que los dragones puedan vivir en paz....

Ben and his adopted parents are devoting their lives to protecting rare and fabulous creatures (like dragons) and at the moment they are trying to save the last of the winged horses, Pegasus unicus; there are three eggs, but without their mother they will not survive and the only hope is to obtain a Griffin feather--but Griffins are enemies of the dragons, and may not be willing to help.

"With talons united ... Luna has always wanted to change the world -- to fix it, to free it -- even if she's never actually known how. Now that all of dragon - and humankind are in mortal danger, Luna is flying back home to Pantala with a team of dragons on a rescue mission, determined to be brave and useful. But saving a continent isn't as easy as a prophecy makes it sound, and "facing a great evil" definitely requires more than the fiery silk that...