Jing Mian, a junior college student majoring in track and field, secretly had a crush on Pei Jingzhe, the good friend of her older brother Jing Heng, when she was young. At the end of the college entrance examination, the confession letter she wrote was maliciously swapped, leading to years of misunderstandings. Mistakenly believing her feelings had been publicly rejected, Jing Mian buried those deep affections away. Pei Jingzhe returned from overseas and took office as the general manager of Xinghe Mall. By chance, Jing Mian did a part-time job as a backup dancer for a friend, and the two unexpectedly reunited. The once aloof youth transformed into a gentle, noble, and mature gentleman, taking the initiative to show goodwill toward Jing Mian. Pei's family was also very optimistic about her, and Pei Jingzhe gradually fell in love with her. A high school class reunion revealed the truth of the swapped letter, and years of misunderstandings completely dissipated.