In the future city, the top "memory scavenger" Ling Su makes a living by accurately erasing the painful memories of others. He is calm and professional, but he is trapped by a blank past in his heart. Until a mysterious woman named Mu Yu appears. Her commission is not to forget, but to find a lost melody. When Ling Su started the dust-laden memory retrieval program, he accidentally sneaked into his erased past. The broken pictures, the burning piano, and the fate closely connected with Mu Yu dragged him into an elaborate conspiracy. He must choose between false peace and painful truth, and that song in the embers will be the only answer.
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