In his previous life, Zhou Xuechi broke up with Lin Du due to a misunderstanding and died alone. After her rebirth, she suffered from "memory loss syndrome". She would forget what happened that day every day and could only rely on her diary to look back. She began to correspond with Lin Du through anonymous letters and get to know him again through words. Lin Du was gradually attracted to the soul in the letter, but he didn't know that the pen pal was an old love who was cold to him in reality. When forgetfulness and memory are intertwined, they must resolve the misunderstanding that spanned two lives before the disease completely devours her.
