There is a kind of library in the world where people can store their memories in books.
The price is that every time you save a period of pain, you will consume a period of happiness.
When the 24-year-old Shen Mo opened the door, there was only a library card in his pocket. He doesn't remember who he is or why he's here. The administrator Jiang Xun told him that there was a book with his name on the third row of bookshelves - but when he opened it, it was all blank.
Someone stole his memory.
Jiang Xun is a man of few words. He stayed in this library for seven years, waiting for someone.
