Born from a failed genetic engineering program, she has spent her life in isolation—a product of perfection without purpose. Everything changes the moment she locks eyes with a stranger on the subway. That same man, masked and dangerous, appears hours later during a bank robbery. When he chooses her as his human shield, her ordinary life shatters.

Descending into Valhalla, an underground facility hidden beneath the city, Yiri discovers a world of supernatural beings and dangerous power. There, she’s claimed as a possession by the enigmatic Kashnic, a man whose white hair mirrors her own and whose recognition of her suggests a truth she isn’t ready for.