In the near future where memories can be safely stripped away, Lu Yu is a top "memory ferryman" who calmly transports clients from the painful past to the peaceful present. He cleared away the nightmares of countless people, but he was unable to touch the huge blank space called "the past" in his own heart. Until a woman named Lin Yuan came with a broken music box melody and asked to erase a memory that was surprisingly consistent with the fragments of his nightmare. When the two people's spiritual worlds accidentally intertwined, a failed "ferry" involved Lu Yu into the whirlpool of truth that he buried himself. He must swim upstream, sail into the sea of oblivion, and find his own island.
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