Psychological Criminal Investigation

There are many doubts about the old case from twenty years ago, but there is no way to investigate it. In order to find out the truth of the year, psychologist Liu Tianming did not hesitate to join the criminal police brigade to face the vicious perverted murderer... As the investigation deepens, it seems that there is a huge whirlpool hidden behind the case, swallowing up those who are trying to get closer to the truth.