Every full moon in Li City seems to cast a cold light on unsolved murders. When young police officer Xiao Zhou first joined the criminal police team, he followed captain Chen Yan and ran into a difficult serial murder case. The victims died in strange ways, leaving almost no effective clues at the scene. The only breakthrough was hidden in the tiny traces under the scalpel of forensic doctor Lao Liu.
Chen Yan is calm and sharp, and can always grasp the key logic in chaotic cases; Xiao Zhou has the energy of a newborn calf, but often gets into bottlenecks due to lack of experience; and Lao Liu relies on thirty years of forensic experience to unearth the "silent testimony" left by the murderer from the bone injuries, organ changes and even hair residues of the deceased. The three of them work together to track down the truth on the moonlit streets of Li City: an unknown female corpse in an abandoned factory, a murder in a secret room in a high-end community, an old case deep in an old alley... Behind every murder, there is human greed and secrets involved. They shuttled between the cold light of the autopsy room and the darkness of the crime scene. They not only had to race against time to catch the murderer, but also faced the shocking joys and sorrows behind the case. In the process of getting closer to the truth again and again, they pieced together the human revelation behind the Licheng crime.
