In the future, 10,000 years later, human civilization has reached level 2.5, But humans began to conquer the north and south. Finally, a disaster came to the earth, and advanced alien civilizations invaded the earth. Finally, humans realized their mistakes, but some atomic bombs could not defeat the alien civilization. At that time, humans entered an era of war, but humans were hit by some unknown substances. Not only did they not mutate, but they also turned into souls. The protagonist Tian also started the journey of souls.
Intention: soul