Fang Yiren (played by Zhang Xiaoquan), a forensic officer with Asperger's syndrome, discovered that the key evidence in a strange murder case involved his missing daughter. In order to hide the truth from his colleagues in the police station and find out the truth privately, he took the risk of using forensic knowledge to mislead his partner Zhao Chengkuan (played by Wang Shixian) and cooperate with the bloodthirsty reporter Xu Haiyin (played by Xu Weining) who held important clues. Fang Yiren will eventually find that it is not his best forensic knowledge that can make the truth come to light, but the long-lost and hidden emotions...