Renovia, once the strongest nation in the world, has collapsed. Child siblings Kairo and Aterah escape to the future but lose the Archeodon crown in the process—an artifact that grants each nation authority over the afterlife. Without it, they have no magic, and the Renovian population is regarded as less than human by the four neighboring kingdoms. Too young to remember where they came from, Kairo and Aterah grow up with the remnants of Renovia: a broken, primitive people that have been oppressed back into the stone age. When the Sigu Nii, an imperialistic people with a bloodlust social hierarchy, discover that Aterah can see the future in her dreams, they send unstoppable warriors tearing through their little outpost and steal her away. Kairo abandons his post to chase after her through uncharted hostile territory. While trying to remain undiscovered, he grapples with cultures that are more technologically advanced and morally barbaric than his own.