Amid the struggle for control in the Empire of Yamato following the disappearance of the Jingi artifacts, the ninja Yahiro begins his search for the relics with plans to sell them at the first opportunity. Rival kingdoms from the north and south are also on the hunt, heightening the dangers he faces. His journey takes a perilous turn upon encountering a female assassin determined to stop him. Further complications arise from interactions with a princess who makes secret visits and a shrine maiden of pure spirit.