If time could be reversed, would you be willing to make a date in time and space to protect the boy you once loved deeply? The young Xia Shixue received a confession from Xie Yi on her 17th birthday. However, she put the same feelings of love for Xie Yi in the form of a letter into the time mailbox, and sent it to Xie Yi ten years later... Ten years later, Xia Shixue and Xie Yi met again, but Xie Yi already had a fiancée. Later, Xia Shixue wrote a reply to herself ten years ago, which changed the future. After experiencing five futures, the misunderstanding between the two was finally solved.
