Once upon a time, those inexplicable desires and passion cooled in time, solidified into the appearance of youth at that time, and grew old with the memory. Zuo Meng, a high school girl with a simple life and a cold and arrogant personality, accidentally met Chen Yiluo, a boy from the same school, on her way to the library. Later, a young man named Gu Zhicheng walked into Zuo Meng's life. What will happen to them in the future? What kind of story will happen to their friends Bai Xiaoxiao and Lin Li? How will Qi Yue live in the future and who will she meet...