An afterlife library that stores the stories of the dead, and if you find a book of someone you want to see there, you can meet them again, even if they are dead, so it is also called the Library of Reunion. Soo-chan accidentally enters the library and meets the librarian Nam-gung Yeong. Yeong-i tells Soo-chan that if he helps her make her own book, she will find his mother's book for him... Will Soo-chan be able to meet his mother again in the library?