During the Yong'an period of Daliang, Xiao Qinghuan, the eldest princess of Zhenguo, who had been married to Saibei for ten years, returned from bloodshed.
Everyone thought she had died in that wild land, but not only was she alive, she also brought back a secret that could overturn the court - clues to the treasure of the previous dynasty.
On the way back to Beijing, interceptions and killings continued. The person who came to the rescue was Shen Zhaoning, the eldest son of the Marquis of Jing'an Mansion, who was known as the most handsome man in the capital.
Everyone knows that Shen Zhaoning is a cockfighting lackey, uneducated and incompetent, but no one knows that the "star observatory" he holds in his palm is the emperor's eye and the deepest knife in the capital.
When he rescued her, he said: "Your Highness, long time no see."
But Xiao Qinghuan didn't remember seeing him.
When she left ten years ago, he was still a teenager, standing at the end of the procession, watching her carriage disappear into the yellow sand.
Ten years later, she came back, covered in scars and full of calculations, except that she had forgotten that there was once a person who handed her a piece of candy when she was most helpless.
Xiao Qinghuan thought that he came back for revenge, to seize power, and to support his younger brother.
But Shen Zhaoning knew that she came back to remember the past that had been deliberately forgotten.
And in that past, there was him.