That night, Ji Xiao was locked at the scene of the murder. Her fingertips were stained with blood that did not belong to her. The surveillance system was powered off and there was no one to testify. Only her fingerprints on the murder weapon became the only clue. Ling Xiao, the most cold-blooded trace inspection team leader of the criminal investigation team, his pupils shrank suddenly when he saw her for the first time - that fingerprint was exactly the same as the key evidence of the serial murder case that he personally sealed three years ago. She is not the murderer, but she knows better than anyone what the murderer's fingerprints should look like. When the entire Internet accused her of being a perverted murderer, only Ling Xiao knew: someone was using her hands to rewrite an old buried revenge.