Because their family moved to country M, An Xia and her friend Ye Qiu agreed to write a letter every week, as if they were still by each other's side!
But when she was seventeen years old, Ye Qiu suffered from a serious illness and died soon. However, she didn't want An Xia who was far away to worry, so she wrote all the letters for the next five years and gave them to her cousin Gu Yuebai, asking him to send them to Country M every other week!
The heavy academic load made An Xia ignore the abnormality of the letter sent by Ye Qiu, and he continued to exchange letters with "Ye Qiu" as before!
When An Xia receives the 241st letter, it is also the day when she learns the truth about Ye Qiu's death. It is the moment when she is about to realize her dream. What will she do? What story will happen next? Let's wait and see...