In a doctor's office, the doctor takes off the bandages around a boy's eyes and asks him if he can see. The boy, Minase Hijiri, looks outside the window and sees Tsuzuki and Hisoka standing next to a tree. He rubs his eyes and when he looks again, no one is there. The doctor asks what's wrong, to which Hijiri replies he is just glad he can play the violin again. Before he leaves, he asks the doctor about the donor whose cornea is used in his cornea transplant. He learns that the donor Otonashi Tatsuya is dead, but he has a daughter by the name of Kazusa.

On the way to the orphanage, Hijiri passes a big black dog, who snarls in the background. [Kazusa's now an orphan, and is staying with a nun]

Hijiri thanks Kazusa for what her father did for him, and apologizes for the father's death. Kazusa tells him it's okay, and is glad that at least Hijiri can see now. Noticing Hijiri's violin, she remarks that her father was also a good violin player. Kazusa makes Hijiri promise to play the violin for her one day.

That night, thunder takes over the skies. Hijiri is in his room, kneeling next to the window. He feels like he has killed Kazusa's father. He looks at his hands, which are covered in blood, like his face. Then he starts to feel guilty for his existence.

The next morning, he goes back to the private school. The principal is glad Hijiri is now fully recovered, and plans to let him play the main violin solo in next month's concert. In the classroom, his classmates surround him and tell him how they have been worried about him and how wonderful it is that he's back. Saionji and his gang make fun of Hijiri and thinks it's a joke that someone who is nearly blind can be the main show. Hijiri talks back, saying that Saionji can't beat him in talent, and is only complaining because his father is rich. Saionji is mad and threatens Hijiri before he and his gang leave the room. Hijiri suddenly feels pain in his left eye. His classmates are concerned and he is prompted to get it examined.

Hijiri goes to the school clinic, where he sees Tsuzuki about to eat a cake. Tsuzuki tells him the main doctor is away and he's the substitute. When Hijiri asks for some aspirin, Tsuzuki searches the medical cabinet and ends up giving Hijiri a bottle of tooth pain reliever. Hijiri tells him so, and finds the right medicine himself. He advises Tsuzuki to try harder next time. After Hijiri leaves, Tsuzuki remarks how Hijiri really does resemble Hisoka in appearance.

In one of the music rooms where the violins are stored, Saionji sets fire to Hijiri's violin. It soon evolves into a big fire and alarms sound. Outside the school, the big dog notes the fire.

The next day in the music room, the music teacher is scolding a student for not being able to play something right. Saionji then proposes to let Hijiri play, since he is going to be the main show for the concert. Hijiri agrees and starts to play. Everyone is impressed by how well Hijiri is, and wonders when he has reached that level. The teacher is shocked because he recognizes the song as "The Demon's Trill." Just then, a bow string snaps and cuts Hijiri across the left cheek. The teacher yells at him to stop, but Hijiri is in a frenzy and continues to play like nothing has happened. He starts to laugh and his left eye begins to glow and show a slit-pupil effect. Some students notice this and decide that Hijiri has been possessed by a demon.

In the clinic, several female students are talking to Tsuzuki about Hijiri. They tell Tsuzuki about "the Demon's Trill”, one of the most difficult violin pieces ever composed. The composer, an Italian man by the name of Taruteeni, is said to have sold his soul to a demon.

Everyone is afraid of Hijiri now. They gossip about him in the hallway and think he is weird and demonic. When Hijiri visit Kazusa, she hides behind the nun and yells, "don't come near me!" Hijiri is very surprised and hurt by this outburst, so he does not see the black dog standing behind him...

Depressed, Hijiri goes to a church. There, he starts to see hallucinations of his classmates calling him a monster. When finally an image of Kazusa shows up and asks him to return her father to her, he collapses. A knife appears beneath his hand, and a deep voice calls out, "your existence is pointless”. As if hypnotized, Hijiri agrees with the voice and ends his life with the blade. Blood flows all around him.

When Hijiri wakes up, he finds himself in a bed and sees cherry blossoms outside the window. As he wonders outloud whether he is in heaven, a voice answers him. {Tsuzuki: "This is not heaven, but it's not hell either."} Hijiri is surprised to see Tsuzuki and Hisoka, especially since Hisoka looks just like him. Tsuzuki, Hisoka, and the two GuShoShin brothers come to his bedside. Hisoka tells him that they are not human, but Enma Cho's employees by the title of shinigami. Hisoka also reveals that they are after the violin Kazusa has given him. Tsuzuki follows and says that behind the violin is a deal with the demon. Whoever plays the violin will go crazy and commit suicide. GuShoShin adds that over a hundred violinists have already died this way. Tsuzuki tells Hijiri they are looking for the violin. However, Tatsuya has already died by the time they get to him, so they try to talk to the daughter. Kazusa doesn't reveal anything though, so they have to ask for Tatsuya's diary from the nun. Per Hisoka's request, the GuShoShin brothers read from the diary, and Tatsuya's voice overlaps theirs in a flashback sequence.

Apparently, Tatsuya has a dream one night in which he meets with a demon. The demon makes a deal with him - he will become a good violinist, but only in exchange for one of his most treasured possessions. The demon then stabs his left eye to seal the contract.

Tsuzuki says that they wish to examine Hijiri's eye, and promises to protect him.

Watari analyses the results on the computer, and finds the contract written in strange text within a round pattern. The contract states that when the deal is fulfilled, the demon gets Kazusa in exchange. Because Hijiri gets the cornea from Otonashi Tatsuya, a part of Tatsuya is technically still alive and the deal is not completed. In other words, the demon is out to kill Hijiri in other to complete the rest of the deal.