Blind Certificate

Blind masseuse Lin Shen was a forensic doctor who was artificially blinded seven years ago when he uncovered evidence in a serial murder case. One night, she recorded by hearing that the female guest Su Qian had her cervical vertebra broken and died. After the police intervened, she recognized the captain Zhou Zheng as the murderer from the footsteps and smell. She forbears to collect IOUs, recordings and other fragments, and connects them with the unsolved cases seven years ago - the victims were all killed by left-handed men. Zhou Zheng and the suspect Zhou Zhengbing were brothers, and his father was the former captain of the criminal investigation team. On the night of the confrontation, Lin Shen detonated the Braille notepad, scalpel evidence and recordings recorded for seven days at the same time, and Zhou Zheng was arrested. But the higher voice calling itself "the system" in the recording is still there, and the real mastermind has yet to be brought to justice.