The Xueshen Sect's martial arts "Yin Yang Wuji" was obtained by Xuan Zhenzi, the head of the Xuanzhen Sect, during a battle between good and evil. Xuan Zhenzi discovered during his practice that this secret book could quickly improve his cultivation, so he regarded it as the Xuanzhen Sect's suppressing martial arts.
Unexpectedly, when he reached the sixth level of cultivation, he became obsessed and started killing people like crazy. So he suspected that there was something wrong with the secret book, so he ordered his disciple Lin Luo to kill him and take the secret book away and destroy it. Lin Luo did not destroy the secret book in the end.
The Blood Demon Sect came to Lin Luo and asked for secrets, but to no avail, they killed the old monk Lin Luo in a sneak attack.
Tingyu accidentally obtained the secret book after the old monk was killed. He vowed to avenge the old monk Lin Luo.
Later, Ting Yu worshiped the Xuanzhen Sect and was shot off a cliff during an operation to explore the demon sect. Finally, he was rescued by the master of the Xuesha Sect and lost his memory, telling him that his life experience was actually the young master of the Xuesha Sect.
So is this old monk's revenge to be avenged or not?