"A Promise for a Thousand Years" centers on Ning Yan, the princess of the Que Kingdom, and Cheng Ming, the third prince of the Yao Kingdom, telling the story of a fateful entanglement that spans a thousand years.
Ning Yan has been troubled by strange dreams since she was a child. There is always a strange man in her dreams who makes her heartbroken and traumatized. On the Dameng Festival, she was hit by an arrow while trying to save Prince Cheng Qian of King Yao. When she was seriously injured, she was rescued by Cheng Ming - the warmth and familiarity in her embrace were exactly the same as in her dream. Cheng Ming also felt inexplicably heartbroken the moment he touched her, as if something deep in his soul had been quietly awakened.
In order to find the shadow in her dream, Ning Yan left the palace under a pseudonym, but she didn't know that fate had already closely connected her with Cheng Ming. Chengming is indifferent on the surface, but secretly he has been involved in the struggle for royal power. He didn't know that Ning Yan was the "catastrophe" that haunted him and made his heartache uncontrollably. Ning Yan was also searching hard in confusion, unable to tell whether the person in front of her was an illusion or real.
From the grasslands of Que State to the deep palace of Yao State, from the legend of Nuoshan to the undercurrent of royal power, the two wandered between conspiracy and true love. He protected her invisible, and she pursued him for thousands of years. When the fog of memory gradually dissipates, a deep love that spans time and space will eventually reveal the answer in love, hate and intrigue - it turns out that all encounters are the reincarnation of a thousand-year promise.
