In the giant city "New Arc City" in 2242, memories can be read, edited and even deleted. The elites use this to consolidate power, while the lower classes struggle with a tampered reality. Yelan, an illegal "memory stalker", has a rare talent - he can sneak into the depths of other people's memories and distinguish the boundary between truth and falsehood. He never believed in anyone, only in the "emotional reverberations" in his memory that could not be erased. An ordinary business commission involved him in a huge conspiracy that could subvert the order of the entire city. He must cooperate with a mysterious client, Su Tong, to retrieve the forgotten truth and his own lost past in the memory maze constructed of lies and codes.