In the near future where memories can be read and played back, Gu Chuan, the top "memory submariner", exiled himself due to a fatal accident. He can sneak into the last memories of the deceased to find the truth, but he cannot face his own broken past. When An Ran, an AI ethicist, comes to the door with the "memory core" of her mother, an outstanding scientist, a seemingly simple suicide case involves a shocking conspiracy that can subvert reality. Gu Chuan was forced to set sail again. In the deep sea of other people's confused and broken memories, he not only had to hunt down the murderer, but also faced the inner demon that dragged him into the abyss. In this journey, everyone is a prisoner of memory.
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