When fewer and fewer people are familiar with your face, your existence begins to collapse - this is the rule of the "cognitive cage". Chen Wei and his two best friends were drawn into a strange world, where death was not due to the exhaustion of time, but to "being forgotten". Every ghost story game is a cognitive gamble. If you win, you will slow down your erasure from the world, and if you lose, you will speed up your being forgotten by everyone. Chen Wei must use his extraordinary IQ to find loopholes in the rules, make a choice between close friends and survival, and uncover the ultimate truth of this memory-devouring world.