Former criminal investigation auxiliary police officer Lin Che was dragged into a life-and-death game called "Response of the Rules" by a suddenly hot "scarlet ticket" in front of the subway turnstile - those who violated the rules would be killed on the spot.
The cheongsam ghost in the Bell and Drum Tower, the crazy doctor in the abandoned hospital, the trapped students in the disappeared classroom, the living shadow puppets on the stage of the ancient town... Each level is a tragic scene that has been covered in dust. The rules are both a way to survive and a reminder. Lin Che, together with college student Su Xiao and programmer Chen Mo who unexpectedly partnered, must uncover the unjust truth behind each level while cracking the strange rules: the students who disappeared ten years ago, the troupe who were silenced, the murder disguised as an accident...
When the rules begin to get out of control, when "obliteration" turns into "eternal imprisonment", they must bet their lives between "obeying the rules" and "breaking the rules": will they become prey of the rules, or will they tear open the curtain of the game and find out the chess player behind the scenes?
"Every time the rules echo, the dead are asking the conscience of the living."
