In a world where memory is food and emotions are quantified, history can be erased and identities can be traded.
Kane, a low-level memory technician, is forced to embark on a desperate journey in order to save his sister who suffers from memory "dissolution syndrome". What he is pursuing is the legendary "original heart" that can repair everything.
However, when he was involved in the secret war between the "Archivals Bureau" that rules the world and the mysterious "Echo Weaver", he discovered that his sister's illness was just the tip of the iceberg, and the truth of the entire world was covered up by a huge lie.
When the tools in his hands become weapons, and when the memories of others turn into power, Kane must make a choice between protecting his loved ones and exploring the truth. Can he find the true heartbeat of the world in this forgotten era? How can he prove that a person's existence is more than just the sum of memory fragments?
