Yong'an Community has its own logic: it is forbidden to go out after ten o'clock, residents on the third floor are not allowed to talk, knocking requires confirming the shadow before opening the door, staying indoors when the fountain is running, saying "hello" when meeting the little girl in red, and never entering the basement. There are people who have tried every rule to make it true and false, but the conclusion is despairing - following the rules means being trapped to death, breaking the rules means seeking death, and doing nothing means waiting for death.
Until Silence found the truth hidden behind all the rules: the erased seventh rule was not made by the rule domain, but a warning left by the last person who escaped alive - "Don't believe the first six rules."
Under the seven rules, there is a line of almost invisible words, which is the last reminder left by that person in the corner of the door frame:
"Don't forget who you are."
