Shen Zhixia and Lin Wanmian were neighbors who grew up together. During the summer vacation of their sophomore year in high school, they accidentally switched bodies in Miaoshan.
At first, they thought it was just a strange adventure. They made an appointment to go to Miaoshan to exchange for it after the college entrance examination.
But the day before the college entrance examination, an accident happened.
Lin Wanmian (in Shen Zhixia's body) stood on the edge of the cliff, watching helplessly as his body - with Shen Zhixia living inside - fell into the valley.
From now on, she must live as Shen Zhixia. She was admitted to the Academy of Fine Arts of her dreams, became the painter she was supposed to be, smiled to her parents, and played the role of the always radiant Shen Zhixia in front of all her old friends.
Until one day, when she was sorting out her belongings, she came across the "Exchange Diary". On the last page, what Shen Zhixia wrote in her own body was: "I think, even if we can't change it back, we can be together forever like this."
It turned out that she had known it for a long time.
