The world of Threa has been long plagued by the AGDS (Ancient Genetic Deviation Syndrome), a pestilence that transforms its hosts into horrifying and grotesque perversions known as Phantoms. These creatures have sought havoc, bringing about suffering, madness, and death wherever they tread; hiding and lurking under the veils of darkness that drapes the corners of the world.

Follow Noralie as she rise up through the ranks of REISS (Rescue and Deployment Command for Infection and Special Cases), and progress through each phantom cases that will test her resolve along with their teammates.

Will she able to form friendship and bond among her squadmates? Or will they become her potential rivals? Ultimately, can she keep her mind sane despite the horrors she may face in this phantom-infested world?