Yamatonokami Yasusada and Kashuu Kiyomitsu were supposed to bring the newly arrived Yamabushi Kunihiro, Otegine and Hakata Toushirou on an expedition to Edo. However, before their departure, the Master became feverish and was bedridden. While collecting survey information on their expedition to Edo, they also head into the mountains to search for medicinal herbs that Yagen Toushirou claims has fever-reducing properties...