In the foggy city where technology can exchange memories, Lin Mo, the top memory exchanger, is an "isolated island" without a past. He can sneak into anyone's deepest memories, but he can't find a moment of his own past. Lin Mo's peaceful life was completely shattered when a mysterious woman Su Jin came to his door with a bizarre commission - she did not want to forget, but just wanted to obtain the "victim memory" of a murder. That fragment of broken memory, like a key, not only pointed to a concealed conspiracy, but also unexpectedly began to unlock his own dust-laden past. In this sea of oblivion composed of countless memories, he must sail, not only to explore the truth, but also to find himself.
