In the futuristic city "New City" soaked in neon and acid rain, memory has become a commodity that can be stolen, tampered with and erased. Ling Su, a former neuroscientist whose future has been ruined, is now a "memory scavenger" wandering in the gray area, specializing in processing contaminated memory data. A bizarre death case draws him into the whirlpool: a corporate giant dies from an "echoing" memory that does not belong to anyone. Gu Pan, an elite police detective from the Order Bureau, was ordered to investigate and met Ling Su unexpectedly. The two were forced to join forces to pursue the truth in the maze-like virtual space and the real world, only to discover that this "echo" not only pointed to a conspiracy that could subvert the world, but was also closely connected to Ling Su's dusty tragic past about his missing sister.
