Go south and forget north

Thirteen years after their marriage, Shao Beichuan (Feng Xiangkun), who had been deeply in love with Shu Nan (Wang Zijia), changes his mind due to infertility. He chooses Ding Yue, who is willing to work as a secretary to stay by his side, and Ding Yue becomes pregnant with his child. Shunan, through the workbook that Shao Beichuan used to write his first love letter, unexpectedly finds a way to have a conversation with the 18-year-old Shao Beichuan, changing her own fate and ultimately giving up on the 31-year-old Shao Beichuan.