The evil shogun Kunitoki has long envied the powers of the ninja brotherhood and would do anything to acquire their knowledge. To this end he has sworn an oath to their total destruction. Once every decade all ninja must travel to the island of Lin Fen where they pay homage to the Shrine of the White Ninja and receive further teachings from the Koga Scrolls. Seizing the opportunity, Kunitoki summoned forth all the spirits from the depths of the netherworld and flung their full force against the amassed ninja. None escaped the wrath of Kunitoki. Word soon reached Armakuni, the last ninja, of the unnatural disaster that had slain his brothers, and gathering all his courage, he swore to wreak a terrible revenge on the shogun and all his followers. What unforeseen hazards lay in wait for him?