In the wake of a global apocalypse, a new world will rise from the ashes. The alien invasion has begun.
Ang, one of the few survivors, explores vast subterranean spaces. In this unchartered shadow world, he unearths the way of the Aura. His captors claim to be allies, shielding him from a much greater threat. No matter what they may offer, Ang will never lose sight of his everlasting objective: Find Rain.
Separated, scared, and burrowed like sewer rats in an incessant, transforming labyrinth, Rain and Ang approach their alien hosts from divergent perspectives.
With so much lost already, and what remains aboveground still at stake, they will strive to break free from captivity. Determined to survive and revive the meager remains of humanity, they will do whatever it takes-even if that means sacrificing themselves for the greater good.