
S01E01 The Human Chair (1)
One morning, a junior-high student, Kobayashi, wakes up and finds himself in his classroom with his homeroom teacher’s body. In his hand is a murder weapon. A high-school detective, Akechi, is called in to assist...
A man who calls himself Twenty Faces commits a series of murders. His victims are all criminals who have escaped justice and have not atoned for their crimes. Before he kills, he posts a message on the Internet to explain who he’s going to kill and why.
The story takes place at a certain middle school where several murder cases take place. Kobayashi, a boy who goes to this school, meets genius detective Akechi, who comes to the school to investigate. Kobayashi takes an interest in Akechi and, in spite of his friend Hashiba's worries, he volunteers to be Akechi's assistant.