--Why did you become the devil?
--That's because I live in purgatory. In the galaxy in the 38th century AD, human society is in the era of cosmic migration in full swing, and there are countless known biological races.
Di Changli, an orphan who has lived at the bottom of society since he was a child, is doomed to be a good man, but he is a man. The whole story tells the story of a man's unyielding and endless struggle against fate...