Taking a step into the air, is the world under her feet a dream in the book or someone's previous life? Whose smile is flashing in front of her eyes, the gentle young man is like jade, whose lover is she? In the chaotic space, is she entering the world in the book that breaks through the void or the unfinished love story that spans thousands of years? Maybe he is a person in the book, but how do you know he is a person in the book?