Gunshot Grief... A Past That Cannot Be Erased.

A suspect wanted by the police is shot dead by someone while being pursued by Eriko (Yuki Amami) and others. Immediately afterward, Katagiri (Tetsuji Tamayama) receives a phone call from the perpetrator warning of the next murder. Later, Kawano (Hiroki Hasegawa), a subordinate of Onoda (Sansei Shiomi) who was investigating the case, is shot. Upon learning that Katagiri was present at the scene, Eriko asks Nodachi (Toyoharu Takeno) about Katagiri's past.