Some hundred years ago， when Akihabara was known as a place for the bad， the Akiba Clan and the Shigai Clan were hard at war. And， in the modern days at Akihabara， a new war has been declared! The Shigai Clan， with their state-of-the-art technology， starts pouring in hatred in town to conquer the world! The wise old chief of the Akiba Clan commits the Ninja girls， Katana Tsukishiro and Shiyuri Hoshigaki， of the Akiba Clan to the task of preserving peace on earth. Katana and Shiyuri， transforming themselves into Akiballion Shadow with the up-to-date weaponry finally completed， challenge gallantly their long-time foe Shigai Clan!