1. The novel begins in Asakawa, a city covered with tall camphor trees. Everything in Asakawa seemed extraordinarily calm and slow, with a drowsy mood unique to summer. Li Xia, who went to Asakawa Middle School from Muro County, met Fu Xiaosi and Lu Zhiang in school. Especially after Lixia learned that Fu Xiaosi was the painter priest she had always liked, she gradually fell in love with Fu Xiaosi. In high school, Xiao Si became a slightly famous illustrator because he participated in the Jinchuan Art Competition in Shanghai. The optimistic and cheerful Lu Zhiang grew up rapidly after his mother's death. Lixia also met and became good friends with the mysterious transfer student in the class.

2. Three years later, everyone separated because of graduation. Li Xia and Xiao Si went to the Central Academy of Fine Arts to continue their studies, and Lu Zhiang studied abroad in Japan. Yu Yu gave up her relationship with her boyfriend Qing Tian for her dream and went to Beijing alone. From then on, everyone's destiny varies greatly, the door to the adult world opens, and the complexity is revealed to everyone bit by bit. After the release of Xiaosi's new painting album, its popularity has skyrocketed. Li Xia became Xiao Si's assistant and girlfriend, while Qi Qi unexpectedly became a singer during college and became a well-known youth idol after releasing her first record. Yu Yu, who has been working part-time to sing, struggled to survive in Beijing, but never gave up on his dream of being a singer. At this time, she met Duan Qiao, a simple boy from Yongning, in a convenience store.

3. In every corner of the world, these young people who once had dreams are struggling on their own. Just when everyone was overwhelmed by the rapid arrival of materialistic desires and could not see the future clearly, they did not know that with various events, greater adversity would almost completely reverse and destroy everyone's life - Fu Xiaosi's plagiarism controversy , Lu Zhiang's imprisonment, Cheng Qiqi's betrayal, Li Xia's departure, Duan Qiao's accident? They drifted with the crowd because they were tainted with the world, they were destroyed by beautiful friendship, and they were forgotten because of the deepest friendship, a friendship that is more precious than love. The best promise ever.