Kasumi has continued her battles as a Sanada ninja to defeat the Tokugawas. Feeling her fatigue, her master, Muhu, allows her time for rest. On the way to her hometown to see her brother, Kotaro, Kasumi meets Toyo, who heads to Okusawa Village to see her fiancé, Yohei. Invited by her, Kasumi decides to stop by Okusawa, as she feels a great comfort she's never felt before with Toyo's innocence and honesty. Yosuke, the village chief of Okusawa welcomes the two; however, Yohei looks grim as he sees Toyo. In fact, the village has been controlled by Yosuke by using drugs. Toyo is raped by villagers, and soon Kasumi becomes a victim, too. Kasumi now stands up to save Toyo and exterminate the terrible fortunes of the village.