In the near future, human memories can be digitally backed up and stored in a huge data center called the "Deep Sea". Lin Mo, the memory submarine number 734, is the watchman of this isolated island. His job is to maintain the stability of data, and the iron rule is "never enter any memory." However, a piece of memory fragment code-named "A-1138" became abnormal, constantly "leaking" the smell of rain and the sound of waves that did not belong to the database. Attracted by this mysterious sense of reality, Lin Mo broke the taboo and sneaked into it. He set foot on a rainy coastline and met a woman named Su Wan. This memory that did not belong to him awakened a familiar feeling deep in his heart, and made him question the truth of his existence and the huge secrets hidden behind the "deep sea".
