In the future city "Yongchuan" where memories can be extracted, stored and traded, Ling Zhou, an amnesiac private detective, is responsible for retrieving lost memories. He is like an island floating in a sea of information, but his past is blank. A mysterious commission involved him in a huge conspiracy: the disappearance of a top memory scientist, and his core memories that were cut into pieces and circulated on the black market. The client, Su Qing, the daughter of a scientist, brought the only clue - a memory chip carrying strange emotions. In order to pursue the truth, Ling Zhou must dive into the deepest part of his memory, not only to piece together the past of others, but also to face his own identity that was deliberately erased. In this sea of oblivion, every exploration is a torture of one's own existence.
