Since the ages before time was measured, the angelic races have existed. Unseen by our eyes, they move through creation, shaping our world, sustaining our existence, and battling demonic hordes. But the war is changing; the battle lines are expanding into new frontiers and the next epoch is emerging.

Centuries after the first humans were exiled from their home, their descendants have pushed eastward into a prehistoric wilderness. In a land shrouded by mist and superstition, primitive tribes struggle to establish new civilizations, unaware that their world is about to change forever.

Weary from unceasing conflict, Sariel—legendary warrior of the Eternal Realm—crosses into the Temporal in search of the only one who can bring him peace. But he is not the first; others have already begun their inhabitation. As the dominance of their kingdom spreads, threatening to engulf all of humanity, Sariel finds himself standing between his own kind and the one he loves and must embrace the life he abandoned in order to secure her freedom.