Middle-aged Bai Yan transferred to Xiangyang Middle School to teach. There was a student in her class named Li Jiahang who was very rebellious. By chance, Bai Yan learned that the student named Li Jiahang was the son of his former lover Xinghua, who had died in an accident more than ten years ago. After learning some things, Bai Yan was surprised and sad. Those memories that had been sealed for twenty years seemed to be slowly unfolding before his eyes...
At the end of the book, Xingzhi's family took Baiyan and his daughter to the mountain where Xinghua was buried to worship. Bai Yan couldn't help but shed tears when he looked at the tomb covered with weeds. He realized that life is just a speck of dust, and it will eventually dissipate in the long river of history after floating around for many times. It is so insignificant when it is alive, and it is even harder to find it once it dies. After a hundred years, you will no longer be you, I will no longer be me, and the story will no longer be a story. Because no one remembers, let alone misses. Only the sun, moon, stars, mountains and rivers are left to witness the passing generations of human beings.