The story takes place in a contemporary city. A start-up company called "Xinjing Technology" secretly developed "memory echo" technology. The device can read and project human memory fragments, but these memories are fragmented and susceptible to interference and tampering. The core rule of this technology is that "memory is not the same as the truth." It only records the subjective perspective of the memory subject, which is full of biases and lies. This technology was supposed to be used to treat psychological trauma, but it was abused for commercial interests and internal strife.
