Lin Ye never thought that his best friend Su Xiao's name would appear in the notes of the fatal rules. Su Xiao disappeared mysteriously three years ago. Now Lin Ye is forced to get involved in copies of the rules. She can only survive by relying on the ability of "seeing hidden comments" - others follow the rules to save their lives, but she has to look for clues left by Su Xiao in the contradictions and warnings of the comments.
The pen in the midnight stationery store wrote her death notice, the white scarf on the circulating bus hid her relics, and the old man in the mist nursing home said "Don't believe the comments" in Su Xiao's face. As the copy went deeper, Lin Ye found that all the rules were aimed at the "annotator", and Su Xiao's handwriting appeared more and more frequently. The last comment made her feel cold all over: "Don't believe yourself - because you are the 'substitute' that the rules are looking for." While deciphering the copy, she must distinguish who she is in front of her.
