Ling Chen, a highly skilled but closed-minded memory maker, discovered an unprecedented "memory excavation" method during a commission, and was involved in the mysterious death of his client. Captain Evelyn of the Order Guards intervened in the investigation, and the two were suspicious of each other and were forced to join forces to jointly track down a mysterious organization called "The Shadow of Nothingness."
As the investigation deepens, they discover that Silas, the leader of the "Shadow of Nothingness", is systematically erasing specific memories. His ultimate goal is to find the legendary "Original Memories", thereby releasing the "Memory Plague" and erasing the entire city's history and individual identity. During the investigation, Ling Chen was forced to face the traumatic memories of a failed surgery, while Evelin had to contend with political pressure and betrayal from the top levels of the parliament. They received help from the exiled former "writer" Elder, and learned that the key "key" to the "original memory" was hidden in Ling Chen's traumatic memory.
On City Day, Silas is about to launch a general attack. Ling Chen and Evelin split into two groups and sneaked into the heavily guarded core of the parliament. Evelin started a fierce battle with traitors and guards in the real world, while Ling Chen entered the core of "Original Memories" and started a "battle of memories" with Silas in terms of ideas and will.
Silas abandons the plan and the crisis is averted. Evelyn became the new Commander-in-Chief of the Guards, committed to reform. Ling Chen stepped out of the shadow of the past and opened a charity clinic to help people reconcile with their memories. However, when he was studying "Original Memories", he discovered that it was not a human creation, implying that there was a more grand and unknown secret hidden behind the existence of Etilburg.
