From publisher blurb:
In the far fractures of the Eltross Belt, on the poisoned world of Ymir-9, something ancient has awakened. A being, neither entirely human nor entirely machine, has woven its will through the derelict cities and dead hives, gathering unto itself a network of sentient machines and rogue minds. You are summoned to the black corridors of Sector Vermillion, tasked with a mission as murky as the poisoned seas: find the source of the growing madness — a technomancer named Zevyr Cain — and end his reign before it spills into the greater systems. But nothing here is as it seems. Whispers of forbidden mergers between soul and circuit haunt your every step, and the deeper you tread into the broken citadel, the closer you draw to something vast and terrible... something that may consume not only your body but your very mind.