The Golden Age is over. Twelve thousand, eight hundred years ago, civilisation lived in harmony from sun-struck Uruk to sea-ringed Atlantis, across the jungles of Amazonia and the Southern Lands.

In Sumer, newly crowned Nin Innana inherits a thriving kingdom and a fractured family. When word arrives that her estranged sister is rallying Neanderthal clans beyond “The Ice,” Innana leads a perilous northern march, determined to stop a war before it starts.