As a series of horrific murders occur in Tokyo, information program director Tsutsui Mankoto (Kishii Yukino) meets a mysterious man, Shitara Hiroki (Shison Jun), at the scene of an investigation. Mankoto is a freelance writer for a weekly magazine, and ends up covering the serial murders with Hiroki, a renowned reporter who has named the murders "The Eye of Horus Murders." The two gradually become attracted to each other, but... This fateful encounter is the entrance to a "darkness" swirling with suspicion and conflict. Believe it or not, the ultimate love mystery begins!!

While reporting on the serial murders known as the Eye of Horus murders, information program director Tsutsui Mankoto (Kishi Yukino) gradually becomes attracted to Shitara Hiroki (Shison Jun), a famous weekly magazine writer. Mankoto becomes the chief of the exclusive reporting team for the case, but she cannot shake her reluctance to turn her camera on the bereaved families. However, as she and Hiroki continue their reporting, something changes... As detective Komine Masaaki (Shirasawa Jin) begins to turn his suspicious eye towards Hiroki, an unexpected situation occurs and the two suddenly become closer...!?

Koki (Shison Jun) and Mankoto (Kishii Yukino) spend the night together. However, Koki acts as if nothing happened, leaving Mankoto in a quandary... Meanwhile, the two receive reports of a "black raincoat man" who is believed to be the culprit in the Eye of Horus murders. Mankoto realizes that a certain pattern has been hidden in the previous crime scenes, and the location of the fifth crime emerges...! Meanwhile, detective Masanori (Shirasawa Jin) becomes increasingly suspicious of Koki... As their romance develops rapidly, Koki's past is finally revealed!!

Mankoto (Kishi Yukino) learns that the "suspicious man" who has been appearing at the scene where the fifth Horus Eye Murder is likely to occur is Hiroki's (Shison Jun) father, Kanji (Hagiwara Masato). Could Kanji be the Horus murderer? Thinking of Hiroki's complicated feelings, Mankoto is even more passionate about solving the case. Meanwhile, while the police are pursuing Kanji as a key witness, Masamasa (Shirasawa Jin) cannot wipe away his doubts about Hiroki... On the fateful day of May 5th, Mankoto, who is staking out the scene, encounters a man in a black raincoat --!?

The fifth body of the Eye of Horus murder case has been discovered. DNA testing has confirmed that the culprit is the same person who attacked Mankin (Kishi Yukino). Meanwhile, the police suspect that the perpetrator is Hiroki's (Shison Jun) father, Kanji (Hagiwara Masato), and are searching for him. As the injection marks found on the body give rise to a picture of the culprit, Mankin receives information one after another that suggests that Hiroki may be the real culprit behind the Eye of Horus murder... Wanting to believe in Hiroki, Mankin heads to his room to dispel her doubts, but a shocking truth awaits her!

While investigating the Eye of Horus murder, Mankoto (Kishi Yukino) finds out that Koki (Shison Jun) is living with a strange woman (Saito Asuka) and breaks up with him. As the possibility emerges that the Horus murderer may have taken the victim's blood home with him, Masamasa (Shirasawa Jin) learns the reason why Koki is so obsessed with "blood". Meanwhile, Mankoto's junior colleague Kinoshita (Kobayashi Toranosuke) receives a report of an eyewitness to the murder, which makes Kinoshita excited, but... As the love quadrangle takes a major turn, an unexpected tragedy unfolds!

"A police officer is stabbed to death on the hospital grounds." Hiroki (Shison Jun) and Mankoto (Kishi Yukino) are investigating a serial murder case called the Eye of Horus murders. Just as they get closer to the truth, detective Owada (Nekobe Tsubaki) is murdered by someone. The murder weapon raises the possibility that the murderer is the same as Horus. Masanori (Shirasawa Jin) becomes even more suspicious of Hiroki, who has no alibi... Mankoto tries to turn a blind eye to her suspicions about Hiroki, but she eventually finds out about the relationship between Hiroki and Mikuru (Saito Asuka)...!? Their brutal past is revealed!!

"Aren't you the culprit?" Mankin (Kishii Yukino), who is covering the serial killings known as the Eye of Horus Murders, conducts an exclusive interview with Koki (Shison Jun), who is suspected of being involved in the incident. Koki answers the suspicions about himself and his father, Kanji (Hagiwara Masato), but the public becomes increasingly suspicious of him. Koki takes Mankin, who is depressed after being removed from the special team, on a trip. Then, on June 6th, the day when the next crime is expected to occur, Mankin heads to the predicted crime scene with Koki and witnesses a shocking sight!!

"Why...?" At the scene of a serial murder case, Mankin (Kishii Yukino) witnesses Kouki (Shison Jun) standing in front of a woman who has been stabbed all over her body...! Leaving Mankin behind as she aims her camera with trembling hands, Kouki flees. The police put out a nationwide wanted list. Amid a flood of criticism of Mankin for letting the culprit slip away, Kouki, who is on the run, publishes a memoir online, confessing to his crime! Is it true when he says he is the culprit, or...?! Kouki's past is revealed... and finally, the day of the "final murder" arrives!!

Mankin (Kishii Yukino) is finally getting closer to the truth behind the Eye of Horus murders. She tracks down the whereabouts of Kouki (Shison Jun), who has warned of the seventh crime, but Kouki points a knife at her...!? Kouki live-streams the incident, declaring, "I'm now going to show you a stage fitting for the end of this serial murder saga that I've created." What is the truth behind the serial murders that shocked all of Japan?! Everything is revealed in the shocking and tearful final episode!! What will remain in the end - love or hatred?