Many years ago, under the city of Gusu, there was an encounter in a bookstore, a past love affair between Ning Yishu and Lu Chengxia. That year, under the city of Gusu, they finished their college entrance examination. One of them came to Gusu because of the past, and the other came to Gusu because he just liked the word Gusu. In the end, they got acquainted. But love is not that simple. Do you think that meeting someone lasts a lifetime? In fact, love means wanting to be together for a lifetime. Many years later, one is the CEO of a listed company and the other is a Ph. D. In ancient literature from Tsinghua University. A coffee shop, a chance encounter. They thought this was the end. Ning's father's sudden appearance changed everything. And where should they go?