The threat of a Black Wolf Fever epidemic has passed, but the Zolian Empire has been plunged into a struggle for succession. At the invitation of the priest-doctor Mana, Hohsalle and Milalle travel to the place where the healing arts of the Pure Heart Creed originated. While there, they not only uncover the surprising history of Zolian medicine, but inadvertently become embroiled in the dispute for the imperial throne.

(Source: Official Website Nahoko Uehashi)