Mouth of Honey, a Needle in the Heart.Haruya Shiki hires Izaya to go to a gambling ring run by an organization named Amphisbaena, which uses integrated circuit casino chips as collateral for their tournaments. Shiki informs Izaya that that Akabayashi recently cracked down on some drug dealers, but Shiki only learned that the supplier is not Amphisbaena. It is later shown that Mimizu, leader of Amphisbaena, has captured Izaya, who is tied to a chair and has a potato sack over his head. Mimizu tries to torture Izaya by pouring water over his head. Earlier that day, as Mairu and Kururi find Izaya near the Rakuei Gym, Izaya is attacked by dojo instructor Eijirō Sharaku, who berates Izaya for possibly violating his sister Mikage Sharaku in the past. However, Mikage kicks Eijirō in his head, telling him that picking fights in the streets would give the dojo a bad reputation. At night, Izaya is guarded by the biker gang Dragon Zombie and meets with Celty to help him transport some information in a laptop. Elsewhere, Hiroto Shijima, second-in-command of Heaven's Slave supplying the drug, learns that the casino chips can record wins and losses electronically, each containing a transmitter and a bug inside. In fact, the goal is for Heaven's Slave to team up with Amphisbaena to expand the business. Celty leaves the laptop unattended, and Heaven's Slave manages to snatch it and evade Shooter in the form of a horse. Thanks to the laptop's GPS device, which tracked the location of the casino chips, Heaven's Slave barges into Amphisbaena's secret location. Mimizu and Hiroto both receive a phone call from an obscure voice, who revealed the respective leaders of Amphisbaena and Heaven's Slave to be Tokage and Kumoi. Izaya cuts himself loose and reveals that he felt like he was not tortured at all. Ran Izumii, who was the caller, and Mikage arrive to beat up their opponents. In the streets, Izaya encounters Haruna Niekawa, who is obeying him because of his promise to take her to see her teacher Takashi Nasujima. Afterwards, Izaya tells Shiki that Amphisbaena has shut down their casinos and disbanded their membership. Shiki notes that Heaven's Slave also split town, but Izaya denies knowing about that. Shiki then says that Akabayashi wants to speak with Izaya. Izaya believes that being an information broker is not just his job, but more so his passion.