The well-known writer Han Xi wanted to propose to his fiancée Jiang Lai at the signing ceremony, but received a message from his girlfriend who died in a car accident. Han was sorrowful and unexpectedly came to parallel. Different time and space, and the time of different time and space is two months later than the original world. The mysterious diary brought in contact with the current Jiang Lai is inextricably linked, and the rescue plan is about to begin.