In a near-future city where memories can be extracted, edited and traded - "Cocoon City" - the past is no longer a private monologue, but a commodity that can be quantified and tampered with. The city is shrouded in a huge dome and isolated from the outside world. History is uniformly promulgated by the "Parliament of Truth". Everyone's memory is implanted with a standardized "historical cornerstone" to ensure the absolute stability of society.
Gu Chuan, a top "memory appraiser" is world-famous for his excellent ability to distinguish the authenticity of memories. He wanders in the gray area, identifying those contaminated or forged memory fragments for his clients, in order to pursue the truth behind the mysterious death of his parents during his childhood - a blank that was forcibly erased. He is cynical, only believes in data and logic, and believes that emotion is the most unreliable impurity in memory.
A mysterious girl named "Zero" comes to him with a memory that cannot exist. It was a memory of real dusk and natural wind outside the dome. In official history, that world died already in the last century. The appearance of this memory, like a stone thrown into a calm lake, instantly broke Gu Chuan's cognition
The identification of this memory involved Gu Chuan and Ling in a huge vortex of conspiracy. They discovered that the entire city's history, and even everyone's identity, may be based on a huge lie called "Code Name 461." A memory appraiser and a girl with a blank identity, one is trying to retrieve the past, and the other is trying to prove her own existence. They are forced to join hands and sneak into the abyss of memory built by data and lies, fighting against ubiquitous surveillance and unknown enemies.
