A police detective chasing after a serial murderer.

A serial killer is targetting women in Kanazawa prefecture. The killer has his victims hung to their deaths. The local cops are assigned to the case, but without clues, evidence or witnesses they are having a difficult time making headway or cracking the case. They finally stumble upon a witness who may help. It seems the criminal was himself the victim of an earlier crime. They hope to use this clue to mitigate more bloodshed and solve the crime spree.—aghaemi

In 2014, a series of murders targeting women takes place in Kawasaki City. All the victims have been killed as if they had hanged and these are dubbed the "Hanging Murders" in public. The police investigation runs into difficulties without clues on the murderer. However, Detective Iguchi from the First Investigation Division has his eye on a man whom he suspects to kill for pleasure. This man is Nogi Naoya. He lies about his identity, erases his traces in public and lives as if he is holding his breath. Nogi is actually Yaginuma Masato, the victim in the sensational Akishima mother and son kidnapping case. He gets his neighbor Yoshika involved as he tries to escape the police dragnet but comes to realize some facts. What is his true motive?