“The apocalypse began inside the hospital. Rachel Adams thought the worst thing that could happen was losing a patient. She was wrong. When a mysterious infection turns dead patients into terrifying monsters and seals an entire hospital from the outside world, Rachel is left to die by the boyfriend she trusted. Derek escapes with the woman he cheated on her with, stealing the hospital's precious medicine and leaving Rachel surrounded by the dead. But Rachel refuses to die. At the moment she is about to be killed, a mysterious Hospital Survival System awakens. [Congratulations, Host.] [You have been selected as the Hospital Administrator.] Suddenly, the hospital becomes her territory. But this isn't an ordinary hospital. The Emergency Room has one rule: Never let the lights go out. The Children's Ward has another: Never answer when the children call your name. The Morgue warns: Never open an empty body drawer. And the ICU has only one command: Never wake the patients.”