The an donuts that Jin and Saki had presented to Princess Kazunomiya are suspected to be laced with arsenic and they are put into the Kodenmacho jailhouse on charges of attempted poisoning. Jin, who is sent to the great jailroom, is subjected to unrelenting treatment by the head of a prisoner's group and his underlings. What awaits Jin next is brutal physical torture by government officials. Jin eventually resigns himself to death and to face Heaven's judgment. Meanwhile, Katsu, Ryoma and Kyotaro enlist Shinmon Tatsugoro's cooperation and attempt to intercede with the shogunate to rescue Jin, but ... In addition, Jinyudo, which has learnt of Jin's arrest, is in utter chaos. Believing that this is the fault of the Institute of Western Medicine, Saburi blames Fukuda Genko who hails from the institute. Fukuda desperately pleads with Taki, who has been put in charge of the investigation of this case, to conduct a fair probe. However, he disregards these wishes, and decides on the death sentence for Jin, who is sent to the magistrate's office ...