Shun You was originally a bloodthirsty demon who only caused chaos in the human world, but he forged a grudge against the fairies because of his robbery of the centenary lamp, a treasure in the fairy world. The Lord of Immortal Palace found a way to defeat Shunyu and nearly dispersed his spirit, but Shunyu learned from an unknown master how to preserve his spirit. Then, he disappeared from the world.
Hundreds of years later, a famous demon-killing family in the mortal world sent Zhang Tingzhi, a fledgling, to slay demons. Zhang Tingzhi, who was still young, met Hua Xian Lian at a critical moment. Lian, who had lived alone in the barren mountains for hundreds of years, saved his life and wanted to help him slay demons. Zhang Tingzhi's senior brother Shuo Wu is a rare demon-killing wizard. He is suspicious of Lian who appears halfway and warns Lian not to follow them.
Lian insisted on leaving the mountain. Some scattered memory fragments in her mind seemed to be telling other people's stories, and all clues pointed to a place called Lingshan. Zhang Tingzhi decided to help her retrieve her memory.
When they returned from their mission, Zhang Tingzhi's master told them that during the time they left, evil spirits were raging in the mortal world and people were panicked. The last time there was such terrible evil spirits was when Shunyou made trouble in the world... Some people said that Shunyou was back.
The demon slayers in the mortal world convened a conference to prepare for this crisis. While Zhang Tingzhi was attending the invitation, he was also thinking of ways to help Lian find the legendary fairy mountain that did not exist - Lingshan...