One day in the future, ancient microorganisms that were thawed out by melting Arctic ice caused an infectious disease that swept the world. The few surviving humans live in many isolated zones scattered around the world, trying to rebuild the once developed human society. In addition to people living in the quarantine area, there are also a few businessmen, travelers or scientists exploring the abandoned land.
The heroine An Lai was born in a small quarantine area in Asia in the third year after the outbreak of the infectious disease. She has lived in a new social system since birth. She lives a daily life while helping her family run the laundry while waiting for new businessmen or ordinary scavengers to pass by her quarantine area and bring all kinds of surprising items.
However, those who come to the quarantine area are not necessarily good people.
On this day, with the sound of sirens in the quarantine area, Anlai's daily life in the quarantine area ceased to exist.