In the "New Chang'an" in 2167, former interstellar agent Lin Che had her memory wiped due to a mission failure and became a low-level data cleaner. She accidentally discovered the abnormal data flow of the implant, pointing to the conspiracy of "Huanyu Technology" to illegally tamper with people's memories. She found Lu Xinghui, a talented scientist who had been exiled for exposing the truth, and the two formed a fragile alliance. They sneaked into the company's core database, only to discover that Lin Che's own memory was also a carefully woven lie, and Lu Xinghui was fatally related to her past. In the end, they fight on two fronts in the abyss of memory and the real world. They must choose whether to destroy the system and free everyone, or retain some control to maintain social stability, while facing the ultimate test of mutual trust.