{Su Yu}, who had just joined the criminal police team, was obsessed with finding out the truth behind his brother's "accidental" death, and ran into a series of murders in Linzhou City. The mysterious symbols on the victims plunged the entire city into panic. The experienced but cold-hearted captain {Lu Chen} was full of doubts about this newcomer at first, until {Su Yu} relied on her super photographic memory to dig out the overlooked clues from the minutiae of the crime scene. As the investigation deepens, the two go from conflict to tacit cooperation. However, the seemingly elegant doctor {Shen Zhiyan} is gradually exposed to be related to the murder and even the death of his brother. Every time he gets closer to the truth, there is a more deadly crisis. {Su Yu} must piece together the truth from the memory fragments and bring the murderer hidden in the darkness to justice.
