Battle androids from a long forgotten war are reawakened by ancient gods to take up arms alongside the scattered remnants of a human resistance as diabolical alien invaders ravage Earth. Combat Unit Thirty-Three is brought online by the divine power of Crom Cruach, and emerges from an underground burial site to discover a world torn apart by war. Armed with dual rail guns, rapid repair drones, and fueled by the god's energy, the android hurls himself into the fray. Risten is a dirt marine, one of the hardened veterans striving to keep up the fight against the invaders. Risten has grown accustomed to being perpetually outnumbered and outgunned, so when she is taken as a prisoner of war, she learns from the enemy even as she struggles to survive. The Vorda, as the aliens call themselves, have come to use their slaves and great harvesting machines to pillage the planet of its natural resources while the warrior elite of their society treat the world as their own playground of bloodshed and debauchery. Can the rag tag soldiers of humanity and the god-forged war machines overcome the sleek weaponry and arcane magic of the hideous enemy?