Miya is a girl who finds herself being chased for her mysterious abilities. At the base of a ninja group in a secluded region, she meets a girl named Rikka, who was born into a family of Fox ninjas.
There, Miya and Rikka develop a friendship, but looking to exploit Miya’s mysterious abilities for evil purposes, the town’s feudal lord kidnaps Miya.
Rikka wants to go rescue Miya, but Rikka’s grandfather, the boss of the Fox ninjas, won’t allow her to, explaining that Miya would only bring disaster to the family.
Rikka puts on the warrior’s mask and transforms into a Black Fox warrior. All alone, she goes to rescue her friend Miya.
However, Miya joins hands with the feudal lord, and is brainwashed by her father who tries to lure her over to the dark side. And Miya is made to fight against Rikka…