Detective Ongo Ishikawa lives for the chase. About to take time off after a long homicide investigation, he is summoned to the murder of a former police officer. He "walks the perimeter," just in case the perpetrator returns. Unexpectedly, he is face to face with an armed man, who shoots him. At the hospital, he "dies" and returns. One of the bullets has lodged deep in his brain and will have to stay for now. At the hospital courtyard, he is visited by his commander, when he a strong headache causes him to look down, then up…at a little girl in pajamas. When he returns to the hospital, he sees her again, and is informed that she just died! Three months later, he goes to a triple murder scene, and is hit with a headache, When he looks up, there's a little boy, silently talking to him. In the upstairs murder scene, he is greeted by the other dead family members, who tell him what happened and ask him to catch the person who murdered them. Later, a suspect is being interrogated, and the little boy shows up again, pointing to the man as the killer! Detective Ishikawa's life will never be the same.
A serial killer stalks the city. Six young women have been found, tortured and stangled at odd locations. A car video system has recorded the last victim, walking with a fit, young adult male. He is identified, and the detectives go to bring him in for questioning. When they arrive, the man uses a large knife to kill himself, which derails the investigation. Detective Ishikawa, after a headache attack, sees the dead man, who freely admits to torture and murder. A cat-and-mouse game ensues, as the detective must find an abducted seventh victim with clues from the smug killer.
A man has been found dead in the courtyard of a block of apartment buildings. Everything about the "murder scene" is wrong: his clothes don't fit, he's been stabbed in the chest, but there's no blood at the scene, and he has no ID. Det. Ishikawa "goes fuzzy" and sees that the dead man's face is very different and asks the pathologist to check carefully. He's had plastic surgery! The apartment residents are on edge and the manager is eerily very helpful and unshaken by the murder. The dead man has/had a secret, as do others, which will complicate this case in unexpected ways.
A couple out to "watch the stars" comes across a dead homeless man with a knife stuck in his chest and a "Handle With Care" sticker on him. The detectives arrive, but the coroner is late, leading to testiness. She arrives, and is bumped by a passerby, which ticks her off. Detective Ishihkawa sees the man in the distance and goes to question him. The man says that he was approached by a young man claiming to be with social welfare, who then stabbed him. Just before he died, the young man told him he was a decoy. Det. Ishikawa runs to warn the forensics team, which has lifted the body, A bomb goes off, injuring team members and sending the coroner to the ICU. Who is behind all of this, and what is his grudge with the Police?
A high school girl on her way to school finds a dead man on the path to her house. As Detective Ishikawa and the others walk to the scene, he sees a disheveled man sitting at the corner. There's no ID on the man, and the is found to have a strange mark on his chest which may have caused his death. The victim, who can't remember his name or what happened, follows Det. Ishikawa everywhere, vowing to stay until the case is solved. Was this man the latest victim of the "bashing mugger"?
A man stops by his reclusive younger sister's apartment and finds the door unlocked and no one there. Stepping out onto the balcony, he sees her, dead on the ground. Coroner Higa arrives and is told that this is a suicide, with no need for an investigation. She looks at the body and finds one of the victim's fingers is stiff with Rigor Mortis. Later, on the apartment building rooftop, she finds a cut and meticulously finished tree twig; but there are no trees around. She conspires with the surviving brother to order an autopsy, but is denied by disinterested senior officials. Detective Ishikawa has been taking a few days off to rest before attending the autopsy with a senior detective. Coroner Higa shows Det. Ishikawa the woman's head/neck x-ray, where he finds a broken vertebra. The next night, Coroner Higa is called to another "suicide" and finds another cut twig on the roof the of the apartment building. Det. Ishikawa asks to see the deceased, and he "goes fuzzy." He later meets the spirit of the second victim in the corridor outside of Pathology and finds out that she was indeed murdered, but does not know the first victim. Who is this serial killer, preying upon depressed college-age women? What is Coroner Higa's agenda? And why is Detective Ishikawa much more interested in this case than usual?
A college-age boy is walking home, talking to his mother on his cellphone. As he crosses an intersection, he his hit by a red imported sedan with a scruffy young man at the wheel. The driver takes off as a man walking his dog comes upon the scene. The victim asks the witness to give his mother a message, then dies. The Detectives arrive on the scene and the bystander reports details of the hit-and-run car. The bystander's dog barks, and there is the dead man. Det. Ishikawa goes over to talk to the victim and learns more about the killer. Later, he makes up a story and heads to the victim's workplace, a French restaurant. Ishikawa asks the restaurant owner if one of his customers drives a red imported sedan with a specific license plate number. The fancy car is owned by a high government official, and it may have been his son at the wheel. Surprisingly, the senior detectives are "walking on eggs" as details surface, urging patience. Ishikawa smells a coverup, since the foreign minister used to be a ranking Police official. Will the culprit be arrested?
A man drags his leg as he leaves a bar and walks into a dark alley. He hears the footsteps of someone following him, and turns to see a gunman. He is shot between the eyes and dies at the scene. Detective Ishikawa and his partner are on the way to the scene when the bullet in his brain comes up in conversation. At the scene, the team learns that the victim was in the organized crime unit until he injured his knee. Since then, he's been on paid leave, and wasn't working on any cases. Det. Ishikawa sees him, but wary of being observed "talking to the air," heads back for the autopsy. The victim appears at the autopsy session, but Ishikawa doesn't talk to him. At headquarters, the similarity between this and a previous shooting come up, especially since the former and current police officers were in the organized crime unit. Do these two murders have something in common? Will Det. Ishikawa's chronic injury force medical intervention?
A toy company delivery man is working on a Sunday and packs a gas cylinder on his way out to "make balloons for the kids." At a shopping center, an 8 year-old boy and his mother are shopping. He's mesmerized by action figures, but his mother tells him to get one when he's with his father. A call of nature separates the two, and he sees a boxed action figure on the restroom counter. The man entices him to a secret meeting in the huge parking lot for a different action figure. The boy is abducted, the parents are frantic, but no ransom demand is given. Much later, the boy is found 40 Kilometers from the abduction site with only a pinpoint strangulation mark and the letter "A" painted on his body with only-visible-under-UV-light paint. Who is this killer and does the painted letter suggest more killings are planned?