Li Minjia, the school's model student, and Zhang Cheng, a boy from the neighboring class, have grown up together. With their looks, personalities, family backgrounds, and life experiences all so well matched, the pair are known throughout the school as the perfect couple. During a long, sweltering summer, Minjia starts high school and, by chance, meets Zhao Jianyu, the school's resident "bad boy." In the bloom of youth, she secretly falls for the rebellious boy, but a misunderstanding leads Zhao Jianyu to deliberately ignore her. In their second year of high school, Zhang Cheng confesses his feelings to Minjia before leaving to study abroad. Minjia is at a loss for words, torn between the two boys and suffering deeply. After Zhang Cheng leaves, Zhao Jianyu, driven by pride, suddenly asks Minjia out. But on the day of her first date, the girl arrives full of hope and affection, only to wait in vain for the boy to show up. Seven years later, after a long courtship, Minjia finally agrees to marry Zhang Cheng. But just then, while away on a work trip, she unexpectedly encounters someone she had long since forgotten...
