In the midst of war, the skilled warriors of the Ninku wreaked havoc upon the Imperial Army, dealing significant damage before ultimately succumbing to defeat and disbandment. Through propaganda, the cunning Imperial Army successfully painted themselves as protectors, demonizing the Ninku by blaming them for sparking the conflict. Fusuke, a former Ninku captain, has taken it upon himself to find his mother, who was taken during the war. Despite his youthful appearance, Fusuke possesses impressive fighting skills. Along his journey, he teams up with former Ninku captains Aicho and Touji to stand up against the Imperial Army and protect the few remaining Ninku from capture and destruction. The Ninku, an elite ninja clan known for their exclusive techniques, have long been pursued by others seeking to control their power. As the last of their kind, Fusuke and his comrades must fight to avenge their fallen clan and resist the threats that led to their demise.