Twelve thousand years before our era, Kael, a young human of unknown destiny, is chosen by an Anunnaki architect to pass through the gates of a forbidden city, where wondrous technologies intertwine with breathtaking beauty. There, he meets Shaira, the first of the chosen, a devoted guardian of humanity's ancient knowledge.

As they venture together into the heart of the city, they are confronted by a fierce conflict between two factions of the Anunnaki. Their battle for the fate of the planet will forge a future whose echo will resound through the ages.