The Great Valley has only known peace for millennia. The land is shared between four races: the humans, the winged helioses, the short but skilled enans, and the gigantic shikkans. But harmony is broken when strange rock monoliths start appearing all over the land, granting extraordinary powers to whoever touches them.
The shikkans, though once willing to share it all, suddenly march to war in a bid to take control of all the regions where the monoliths have appeared. It seems nothing can prevent the fall of the remaining three races—until the teenage children of the helios king find an unusual connection with the monoliths. The king’s children, two helioses and two humans, begin to discover their role in a conflict that’s threatening to destroy the Great Valley, their world contained and surrounded by the everlasting barrier known as the Endless Wall.