In the future city "Xinhai" where memories can be transplanted and deleted, elite police detective Lin Feng is trapped by the nightmare of his past. A bizarre murder case involved him in the whirlpool: An Ran, the only witness, implanted the last memory of the deceased - Dr. Chen Jing, a pioneer of memory technology - before his death. Lin Feng must cooperate with the girl who carries the "soul" of the deceased to pursue the truth in a maze constructed of lies and tampered memories. When An Ran's personality was gradually eroded by the memory of the deceased, Lin Feng had to face the painful past about his daughter that he had been trying to forget. This is not only a hunt for the murderer, but also a cruel torture about identity, redemption and the boundaries of human nature.
