Masha is an ordinary nurse with nothing going on in her life other than work. But suddenly she found herself in a world similar to a science-fiction horror film, in which she has to survive every second, fighting those infected with a terrible infection. And one day, leaving the refuge that sheltered her in this terrible world, the girl has to start fighting for her life, falling from one adventure to another. Until you accidentally end up at the origins of something unknown and terrible.