Seulgi only hears the start of a scream when she jumps out of her sports car and tears down the barren road on her own two feet. Meanwhile, with shaking hands, Yeri takes count of the food, portioning it, trying to see how long she could survive, and tries not to think of when she might run out. That is, under the assumption that the zombies lurking outside find their way in. Or, the world has gone to hell.