An orphan named Taro killed who Tein-Hei told her was the killer of his family. Taro found out, years later that Tein-Hei is the true killer and the man he killed was his father. Taro's revenge attempts start off a trail of assassinations and ninja swords fights spanning from Hokaido, Alaska to California where Tien-Hei's secrets gradually unfold. The revenge road leads to a climactic battle with Tien-Hei on the fall of Japan's Shogun-era.