During the chaotic times of the Warring States Period, a local lord secretly dispatched a ninja to find out about the fighting power of Karimata Sadayoshi. However, on the way to complete the mission, the plan was exposed and he was defeated by Karimata's elite ninja unit "Immortal Ninja". A woman with a huge baggage, Bunto Rangiku, searches for the legendary ninja Kato Danzo and encounters the hunted Genin "Yaya Saburo". The story of revenge begins.