In the future city "Weicheng" where memories can be read and traded, Ling Chen, a top "memory diver", was hired to extract the last memory of the late marine biologist Dr. Evelin. He thought it was just a routine data recovery, but he accidentally dived into an encrypted deep-sea illusion full of unknowns and warnings. This fragmented memory is like a dangerous puzzle piece, dragging Ling Chen, the doctor's mysterious granddaughter Anya, and the giant corporate "Eternal Group" trying to cover up the truth into a deadly whirlpool. In order to explore the truth, Ling Chen must dive into not only the unknown deep sea, but also the darkest corners of human nature and memory.