In the future world, human beings will upload their memories to the "Memory Backup Bureau" in order to avoid accidents and achieve an alternative "immortality". Li Yang, as a senior auditor of the Backup Bureau, deletes violence, lies and taboo emotions that are judged as "violations" by the system day after day. However, during a routine self-calibration, she was horrified to discover that there were traces of tampering in her core memory sequence. This unexpected discovery was like a key, opening up her dusty past. Li Yang began to investigate secretly, but gradually pieced together the shocking truth: she was once a freedom fighter who resisted "memory control", and now the director of the backup bureau, Luo Chuan, was actually her most trusted friend who fought alongside her back then. Not only did he betray his ideals, he also attempted to use "memory reshaping" technology to transform the memory of all mankind into a "perfect version" to create a utopia without pain and conflict but without reality. Li Yang must make a choice between the lies weaved and the bloody truth. Can she awaken the sleeping humans, expose Luo Chuan's conspiracy, and prevent a "perfect" catastrophe concerning the memory and freedom of all mankind? A war deep in memory began quietly.