The great war between dragons and phoenixes came to an end. Prince Ao Chen and Qingluan Fengli, the princes of the Dragon Clan, stayed away from the world. They originally wanted to stay away from the hustle and bustle, but due to the battle between the Yellow Emperor and Chiyou, Yinglong was in danger and rushed out of the mountain with the safety buckle that sealed the Hetu Luoshu. Ao Chen was seriously injured in an ambush by Chi You. Feng Li, who was pregnant with Liujia, burned her soul and offered her inner elixir to save her husband. They gave birth to their daughter Long Nianyao in a sea of blood on a mountain of corpses. The couple was forced to live in seclusion for three thousand years and entrusted their little girl and the most precious treasure to the Nine Heavens Xuannv.
Long Nianyao is an orphan of dragon and phoenix, who possesses the Hetu Luoshu, which is coveted by the three worlds. She has been frail since she was a child but has been loved by thousands of people: the God of War Xuannu cares her like a mother, the originator of Feng Shui Yang Gong, the handsome Yue Lao, and the stunning Meng Po. She is the most favored little fairy boy in the three worlds.
The peace was finally broken. The heavenly fairy Sanniang, who was madly in love with Yang Gong, became jealous and evil. She took away the safety button and instigated the mortal boy Ling Canglan to break with Nianyao. In grief, Nianyao transforms into a dragon and inadvertently injures a mortal, and is punished by the heavenly court. Xuannv asks for punishment for protecting her daughter. Nianyao is instigated by Sanniang to atone for her sins, and commits suicide by swallowing the treasure to protect her. After Ling Canglan learned the truth, she jumped off a cliff and died for her love. The two fell into reincarnation for hundreds of generations, and they were always at odds with each other.
Xuan Nu was afraid that Nianyao would lose her fairy soul, so she asked herself to guard Meng Po's house.
Unexpectedly, Sanniang falsely conveyed the imperial edict and said that Nianyao's miserable fate was a calamity of love. Hou Siming saw through Sanniang's conspiracy and secretly rewrote Nian Yao's fate in this life. In this life, under the protection of Xuannv and the guidance of Yang Gong, Long Nianyao awakens the memory of the past life and the bloodline of dragon and phoenix, solves the misunderstandings of hundreds of generations, reconnects with Gu Xinghua, punishes the evil fairy Sanniang, returns Hetu Luoshu to his rightful place, and fulfills the destiny of three lives and the kindness of the three realms.