Sound Contract

In an era where memories can be retrieved, traded and tampered with, how do you prove that "I" is "I"? In the near future, with the popularization of "voiceprint memory" technology, human memories can be recorded as "voiceprints" for storage, repair and even trading. This has given rise to a prosperous gray industry, the "echo black market," and has also laid the foundation for a crisis that subverts individual identity and social order.