When Shen Yuan was still a fox, he was rescued by Cao Yan who lived in seclusion in the mountains.
In order to repay his kindness, he practiced hard and finally transformed into a human form.
But Cao Yan, a human with a short lifespan, was not able to see his appearance after his transformation.
Shen Yu'an was depressed and vowed to wait until Cao Yan was reincarnated.
Finally, after seven hundred years, Shen Yuan met Cao Yan again in modern times...
