Trapped in a frigid isolation cell within Saint Icaros Hospital's emergency ward, a patient awakens with no memory of how they lost their arms, only the grim certainty that something catastrophic is unfolding within these walls. Patients are succumbing to inexplicable illnesses, and the answers to both the outbreak's origin and the protagonist's own mutilation lie buried somewhere in the facility's depths. Survival means piecing together the hospital's sinister truth while navigating encounters with both monstrous entities and hostile staff, all while lacking the physical means most would rely on—demanding cunning, stealth, and resourcefulness to navigate the horrors that stand between imprisonment and escape.