Woodpecker Detective's Office

Genius poet Ishikawa Takuboku moves to Tokyo with the help of an upperclassman of his, Kindaichi Kyousuke. Enraptured by both drink and women, Takuboku finds himself perpetually out of money. One day, the two men decide to drop by Asakusa and find themselves primary witnesses to a murder. The victim, Tatsukichi, worked in the home of Oguri, the head clerk to the Arakawa mines. When the murder weapon and a letter of accusation written by Tatsukichi are discovered, Oguri is arrested for the crime, but Takuboku isn’t convinced…

A prostitute from Hananoya, O-Taki, has been killed. When Takuboku says, "I saw Kyousuke in O-Taki’s room," Kyousuke becomes a prime suspect. Meanwhile, based on the fact that Takuboku’s romaji diary was left in O-Taki’s room, Kyousuke begins to suspect that Takuboku might have done it. Where does the truth really lie?

Kyousuke has been arrested. Hagiwara Sakutarou, Nomura Kodou, and the others gather at the "milk hall," a small cafe serving European beverages and foods, to try to discover the truth of the situation. Each of the literary men unveil their deductions. Natsume Souseki introduces Akutagawa Ryuunosuke who also participates in the puzzle solving, but none of them come up with a deciding theory. As they ponder, a boy named Hirai Tarou steps forward. Hirai tells them that everything started two nights ago…