Mysterious Bookstore: Twelve-year-old Sang Xiaoyu discovered an old bookstore called "Between the Lines" on a rainy day. The owner was an eccentric old man wearing round glasses. The bookshelves were filled with strange books that glowed and floated.
- Magic book: Sang Xiaoyu was attracted by a glowing "Star Fairy Tale Collection". When she touched the spine of the book, the book suddenly unfolded a miniature starry sky, sucking her into the magical world in the book.
- Book world: Sang Xiaoyu found herself in a fantasy forest made of words, and met the talking book elf "Modiao" and punctuation marks that can turn into birds.
-Guardian mission: Mo Dian tells Sang Xiaoyu that she is the chosen "book keeper" and must help repair the disappearing fairy tale world, otherwise all stories will disappear forever.
- The villain appears: While searching for the first lost page, Sang Xiaoyu encounters a "word-eating beast" formed by ink stains, which specializes in devouring good plots in the story.
Concept: Star Adventure in Magic Bookstore