1. Professor Xu's paper on the slang lawyer was made into a chip by him and put in a cross necklace. This pendant necklace was given to his lover by Professor Xu.
2. The thesis is in the hands of Professor Xu's lover, who is none other than Han's wife, one of the distinguished guests in the prison.
Gao Meihao also learned the secret of the paper from the patient's family, but at the critical moment, Professor Xu's lover disappeared with a necklace.
At first, Piao Chang-hao was entrusted by the mayor to investigate the authenticity of the newspaper, so he was framed as a mouse by a mysterious man and went to prison. After her husband was imprisoned, Gao came to work in the hospital where Professor Xu worked before his death, just to find out the whereabouts of the paper.