Wu Li was diagnosed with a mental illness and imagined he had a grandfather, along with a world full of demons and monsters.
After recovering, a video of someone hanging themselves shattered his mirror, turning Wu Li into a tenth-generation reincarnator. Only then did he realize that he wasn't the one who was ill. It was the world.
Calamities returned, and ghosts and monsters appeared.
The age of cataclysm had arrived.
Years later, Wu Li looked at the evil spirits covering the heavens. He swept his long saber across and spoke softly:
"I am reincarnation. I shall slay demons and monsters, and suppress every evil spirit in the world."