In 2077, memories can be stripped and stored. Lin Mo is the sole caretaker of an isolated island base in the "Sea of Oblivion", sealing up the painful memories of people's abandonment day after day. He chose this secluded job to escape his broken past. Until one day, a memory file numbered 734 arrived, in which his long-forgotten face and voice were engraved. When he opened this Pandora's box, he found that he was not only the keeper of memory, but also a prisoner imprisoned by a huge lie. Forgetting is not salvation, but the truth is lurking in the deepest part of memory, waiting to swallow him completely.