In the new city "Hailin City" in 2077, memories can already be designed, edited and implanted. Ling Shuo is the industry's top "memory architect" and he can weave the most perfect virtual life for his customers. However, late one night, a memory that did not belong to him appeared in his mind out of thin air - a bloody memory of him strangling a strange woman to death with his own hands.
This "ghost echo" was so real that it made him shudder, and every detail was as if he had experienced it personally. The system's self-diagnostics showed everything was normal, and security logs proved he never left the apartment. In order to clear away the sin imposed on him, Ling Shuo was forced to hire a private detective who wandered in the gray area-Su Wan. Su Wan did not believe in any implanted memories, only the most primitive evidence and human nature.
As the two investigated in-depth, an even more horrifying truth surfaced. Perhaps what was in Ling Shuo's mind was not a simple forged memory, but an activated "seventh personality" lurking in his body - a cold personality belonging to a top killer. Is he an innocent person who was framed, or is he a monster that he doesn't even know he is? In this city built of data and lies, Ling Shuo must race against the "ghost" in his mind to find his true self before he is completely swallowed up.
