The background of the story is that the destruction of the natural environment is leading to major cleansing and restarting. When facing the beginning of the apocalypse, the four-person team starts from a small area. From their perspective, they look at the changes around them, how the apocalypse will come, and human nature is tested.
Under extreme conditions, how to re-view every relationship, how to survive, and how to face unprecedented pain and choices are what everyone needs to experience in this end of the world. Maybe trust and companionship come suddenly, but knowing each other and staying together must be the most real thing that has been tested by time.
Purpose: What people need to respect most is themselves