There are constant cases in City A of Country Z. Forensic doctor Linghu Changsheng and police detective Zhou Zhengren jointly investigate the cases. When they were investigating the case of the iron bucket female corpse, they encountered pressure from their superiors and interference from public opinion. During the arduous investigation, key clues were unexpectedly helped. These clues allow them to find evidence connections, such as fibers, DNA, etc. That point to the suspect. With this, they find direction in the foggy case, in contrast to the deadlocked investigation. In the end, they will uncover the huge conspiracy behind it and make the truth known to the world.
