In the future city "Xinhai" where neon lights and rain intertwine, memories can be read, but the cost is the wear and tear of the soul. The top "memory retrieval master" Ling Su can sneak into the last reverberations of the deceased to pursue the truth. He was already numb in countless broken memories, until a seemingly simple upper-class murder case dragged him into a huge whirlpool. A strange symbol in the memory of the deceased leads to the darkness at the bottom of the city and a forgotten forbidden experiment. Joining forces with Gu Pan, a young police detective full of a sense of justice, Ling Su not only has to fight against the killer in reality, but also faces the inner demons that arise from the "echo" deep in his heart. When the fragments of truth are pieced together in the eternal night, is the whispering dawn a redemption or a deeper despair?
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