Han Lingsha, a girl looking for the legend of the Sword Immortal, met Yun Tianhe, a young man from the mountains, on Qingluan Peak. She went down the mountain to explore Yun Tianhe's life experience. Later, she met Liu Mengli and Murong Ziying by chance, and together they slowly uncovered the truth.All the grudges between the Kunlun Qionghua Sect and the Huan Ming Realm were revealed.Amidst the disputes between the human and demon worlds, the four of them were also dragged into the torrent of fate. In various adversities, they did their best to resolve the disaster and made their own choices.A hundred years later, the youth is still young...

At this time, the demon general Guixie also died to save Mengli.Tianhe watched Lingsha, Ziying, and Mengli being shaken up, and Qionghua Peak began to ascend. On the other side, Feng Er and others were assisting humans and demons in evacuating, and the eight major sects were also protecting everyone from evacuating. Qingyang saw that the situation was not good and stopped.The sword flew to Qionghua, and what he saw was that the low-level disciples were already frozen, with numerous casualties. As they ascended, everything around them began to freeze.

Tianhe had not yet mastered the power of his twin bows, so he forcibly fired the sword light in an attempt to cut off the two swords. Unexpectedly, the two swords sucked back the power of the yin and yang purple que in his body. Tianhe was hung in the air until his soul left his body and passed out.

Tianhe Yuanshen came to Buzhou Mountain and met Zhulong. After being enlightened by Zhulong, his soul returned to his true form and he made a hundred-year agreement.After Tianhe Yuanshen returned, he began to absorb the spiritual power of the two swords, and transformed into two golden arrows to shoot down the two swords. Qionghua Mountain began to descend, and Xuan Xiao was crazy and wanted to perish with everyone.

At this time, Xuantian Goddess appeared to drag down the falling Qionghua Mountain, suppressed Xuanxiao, subdued Suyao, and rescued the people. However, she also said that Qionghua's ascension was against the heavens and had to pay a price. After Xuantian Goddess disappeared, Qionghua continued to fall, and saw that Qionghua continued to fall.It was about to hit the village at the foot of Kunxu Mountain. At this time, Mengli suggested that everyone go to the Huanjing Realm, and Qingyang used his life to help everyone escape.Everyone came to the fantasy world, whether human or demon, they put aside their grudges at this moment and worked together to help Tianhe draw his divine bow and shoot the falling Qionghua.Everything returns to calm.

In September 2016, the semi-annual report of Shanghai New Culture Media showed that Shanghai New Culture Media had obtained authorization from game producer Daewoo Information to film the TV series "Legend of Sword and Fairy IV"; in June of the same year, Zhejiang Dongyang New Media EsliteCulture Media Co., Ltd. has been registered with the State Administration of Radio, Film and Television. The number of registered episodes is 40, and the registered drama name is 《Sword and Fairy 4》.

In February 2017, the project was in the early preparation stage.

On May 27, 2020, New Culture signed an agreement with iQiyi to produce the TV series - Legend of Sword and Fairy IV - at a total cost of 312 million yuan.According to the agreement, the total production cost of - Legend of Sword and Fairy IV - (tentative title, subject to actual broadcast) is 312 million yuan.This cost is fully borne by iQiyi, which means iQiyi’s investment ratio in the series is 100%.The total production cost budget will be settled based on the final number of episodes broadcast on the platform and the unit price agreed in this agreement; on September 21, Wanda Film released its annual film list for 2021-2022, which includes TV series launched by its subsidiary New Media Eslite《The Legend of Sword and Fairy IV》.

In October 2023, the original 40 episodes were changed to 36 episodes; on January 17, 2024, the official WeChat account of the show was launched.