[Machine Translation] "The details of a psychological experiment conducted 20 years ago at the S University Sociology Department must be made public by 24:00 today. If they are not made public by the end of the date, I will be killed." A letter was sent to the police. The sender is the son of the professor who conducted the experiment. According to the subject, the experiment was nothing more than selecting one person out of 16... What was the meaning of the experiment? What was the purpose of the kidnappers? There are only 4 hours left until the date changes.