"Vulcan is on trial, accused by the evil Ahriman of breaking the Cosmic Rule--interfering in the plans of a fellow god! His only hope is finding five powerful artifacts scattered across the globe. But is there more to this quest than meets the eye? Meanwhile, Nico, Buck, and Lula see their simple supply delivery to the hidden underground land of Agaartha get complicated fast. Their friends in the newly founded unicorn colony are being menaced by yeti raiders--but are the yeti acting alone, or are they just a small part of an earth-shattering conspiracy? As Buck defends his old brigade, Nico and Lula must unravel the mystery--and the fate of the universe hands in the balance!"--Back cover.