In a world that seems full of despair, Cha Hyun-soo (played by Song Kang), a young man who has no nostalgia, still stands firm and straight under the pressure of life.When his family dies in an accident, he is forced to face the cruel reality that his life no longer seems to be able to find any hope.However, he did not choose to escape, but chose to face it head-on, fighting against endless fear with tenacity and courage.

Hyun-soo moves into a new apartment and tries to find a new start here.However, his peaceful life is soon disturbed by strange events that begin to occur in his new residence.When the surrounding residents turned into ferocious monsters one by one, Xianxiu's world was completely turned upside down.In this environment full of despair and panic, he must find the possibility of survival, for himself and for the sake of his neighbors who are still struggling.

The story is adapted from the comic of the same name co-created by Kim Canby and Huang Yingcan and serialized on Webtoon.