In the "Floating City" where memories can be extracted, traded and erased, Lin Mo, a top memory appraiser, spends his days accompanying others' joys and sorrows, but he can't find a key piece of his lost past. A mysterious commission draws him into the whirlpool: a woman named "Nightingale" asks him to identify and destroy a memory crystal that carries great pain. When Lin Mo dived into that broken memory, he discovered that the protagonist of the memory was actually himself. He was forced to make a choice between pursuing the cruel truth and guarding the false peace, and the shadow of the city, as well as his fate with the nightingale, slowly surfaced in this sea of oblivion.
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