When the Koma clan attacks the Fuma clan and steals the Holy Grail, only one ninja survives. Transformed into a cyborg, it is his task to retrieve the Holy Grail and save the world.When the Koma clan attacks the Fuma clan and steals the Holy Grail, only one ninja survives. Transformed into a cyborg, it is his task to retrieve the Holy Grail and save the world.When the Koma clan attacks the Fuma clan and steals the Holy Grail, only one ninja survives. Transformed into a cyborg, it is his task to retrieve the Holy Grail and save the world.