Troubled times in the Spring and Autumn Period.
She is Ji Zhi, the daughter of Duke Zheng Zhuang, and he is Boji, the adopted son of a traditional Chinese medicine doctor in the Earl's Mansion.
From the boss to the hairpin, they know each other and cherish each other.
At the age when love first emerged, he stayed with her as a book boy, reading poems and books and practicing martial arts with her.
Later, when the situation was unstable, as a daughter of a noble, she could not escape the fate of marriage and married Jiang Jue, the second son of Duke Xi of Qi. But Boji was appreciated by others, abandoned his literary career and joined the army, and rushed to the battlefield.
He was accompanied by swords all day long, and could not sleep well all night. Every year when the crabapples were in full bloom, he would pick one, trace its appearance, carve it on a bamboo slip, write a letter from the author, and mail it to his adoptive father.
He died in the ninth year of her marriage, when the begonias were in full bloom and before it rained. That year, the army was defeated, the city was destroyed, and people died.
Concept: The life of a noble in the Spring and Autumn Period