In the "Hive City" of 2077, humans rely on "memory storage technology" to achieve eternal consciousness. However, excessive memory retrieval leads to "increased memory entropy" - "disordered people" with memory disorders frequently appear in the city, and ancient emotions and real memories gradually become luxuries. The protagonist Lin Ye is the only "Lampkeeper" who can perceive "original memory fragments". His job is to repair the memories of the disordered, but during a mission, he discovered that the memory of the "Old Lighthouse on the Seaside" that flashed repeatedly in his mind did not actually belong to him.
As the investigation deepens, he gets acquainted with Su Xiao, a rebel who is trying to destroy the memory storage system, and Chen Mo, an official scientist who holds the core secrets of the technology. In the struggle between "maintaining order" and "returning to reality", the three of them uncovered the origin of memory storage technology: a hundred years ago, a group of scientists built the core of the system using the "native memories" of the first-generation lampkeepers in order to save humanity after the war, and Lin Ye was the "memory copy" of the first-generation lampkeepers.
When the city is on the verge of collapse due to the increase in memory entropy, Lin Ye must choose: continue to be a "tool" to repair false memories, or destroy the system and let humans face painful but real memories again? In the end, he stood in front of the memory core that was about to collapse and chose to retain the "lighthouse memory" - the last primitive human emotion of "love and perseverance". He used his own consciousness to light the old lighthouse in reality and became the last light connecting the "false order" and the "real future".
