In the spring of 1945, deep within the shadowed streets and crumbling alleys of Gyeongseong, a place teetering between colonial despair and the whispered hope of liberation, humanity’s cruelties have taken grotesque form. Under the suffocating grip of the occupying forces and their whispered experiments on civilians, rumors swirl of strange Najin—creatures born of human suffering and unnatural science, stalking the night and feasting on fear.