"Feng Qianyu" is a secret book of immortality left over from ancient times. All immortal cultivators want to get it.
Chaohan was ordered by his master thousands of years ago to protect "Feng Qianyu" from falling into the hands of outsiders. He had no choice but to draw a sword against his junior sister Jiu Yun who had betrayed the master.
Jiu Yun was ambitious and wanted to subvert the fairy world, and was always in trouble with Chao Han. The two of them once fought to the death.
In the end, Chaohan won and sealed Jiuyun, but "Feng Qianyu" disappeared during the battle...
Purpose: Some people are not born suitable for cultivating immortals