In a future where memories can be safely removed, data analyst Lu Ming chose to erase a painful past, but found himself trapped in a huge conspiracy after waking up. A mysterious woman, Su Qing, claims to be his guide, but an encrypted message from "him in the past" warns him: Don't trust anyone, especially her. In order to retrieve the deprived truth, Lu Ming must sneak into the "archives" where all human memories are stored, and salvage the echoes of the past that determine the fate of mankind in the isolated island of data.