In the future city soaked in neon and rain, memories can be accurately removed and sealed. Lin Mo is the top "memory archivist" in the industry. He erases the pain of his clients with scalpel-like precision, but he is like an isolated island, and his emotions have long been smoothed away by professionalism. Until a mysterious client brings a memory that shouldn't exist, Lin Mo discovers that his forgotten past is like a deep sea, quietly swallowing him. When the boundaries of his career and the truth about himself begin to blur, he must dive into this dangerous sea of oblivion and salvage the buried, true self, even if the cost is to face all the pain he has buried with his own hands.