Zheng Dan had read widely, but all that knowledge couldn't satisfy him. Worldly desires swelled within his heart, and he began to pursue them.
One day, he met Xu Ji, a man from three thousand years in the past, and the two shared a romantic encounter (strike that). By chance, Xu Ji recovered his memories and told Zheng Dan about the elixir of immortality. And so Zheng Dan began pursuing the ultimate worldly desire: eternal life.
"Xu Ji, human ability really does have its limits! In the first seventeen years of my life, I came to understand one thing: the more people pursue knowledge, the more ignorant and empty they become. I want to become something beyond human!"
"What? What are you talking about?"
"I'm going to seek the elixir of immortality! Xu Ji!"
