A blind boy, Shinobu, lives a peaceful life with the support of his kind teacher and girlfriend, Mikoto, training daily to learn the ancient martial art of self-defense known as "Mibuchi Toshujutsu". Until one day, when all is stolen from him by a strange visitor who appears at the dojo. This man, defeating both Shinobu and his teacher, steals away Mikoto with him. Three years pass- In order to take back his girlfriend, Shinobu climbs up from the depths of despair, and finds himself at a remote island prison where only the most abominable kind of criminals are housed. There begins a battle royal, a free-for-all fight to the death with the villainous men within!!