I traveled through time and became a Tang County captain, and was framed for poisoning the princess at the beginning! Three days later, he was executed in Lingchi, and all the civil and military officials in the court were waiting to see the joke. But no one knew that Gu Linyuan, a modern criminal investigation expert, came with a full set of forensic knowledge - identifying the real murderer from a drop of blood, using fingerprint comparison to shred perjury, and even restoring criminal methods that transcended the times. At the moment when the verdict was overturned in public, the officials' legs went weak and the emperor sat in shock. He was awarded the title of "The No. 1 Detective of the Tang Dynasty" on the spot. The layout of powerful people? Serial murder? Let's see how I use modern science to uncover the demons and ghosts from the darkness of the prosperous Tang Dynasty one by one!