Mikoto Misumi is a female forensic doctor who works in the private forensic organization “UDI”. This organization specializes in receiving remains of people who died due to abnormal causes and dissecting them to find the truth of the case.Working with Mikoto, there are also the Forensic Medicine Nakado Department, recorder Kube Rokuro, and examination technician Tokai Hayashi Yuko, among others.

Although Nakata has rich clinical experience, his personality is eccentric. There are often irreconcilable conflicts between Mikoto and Nakata, who have different understandings of justice and law.In fact, Zhongtang has a secret that no one knows. His girlfriend died in an accident, but various clues revealed to Zhongtang that it was a serial murderer who took his girlfriend's life.Zhongtang stayed in UDI despite being told by others just to find the murderer of his girlfriend.