Shinjuro may be a little young to be the master of a swordsmanship school, but fate didn't give him any choice. Now, his position and martial skills land him right in the middle of serious trouble when the rogue samurai Mikage faces off against the Tokugawa government. Mikage has his eyes on the legendary sword known as Mizuchi, and is willing to destroy all of Edo to get it. Caught in the middle, Shinjuro and the band of beautiful swordswomen who train at his school must protect the town from harm. However, they won't really be challenged until the Tokugawa house calls in a favor, and the young swordsman is forced to duel Mikage himself! His opponent will be using the most powerful weapon Japan has ever seen, but if the swordswomen can stop fighting over Shinjuro long enough to cheer him on, then the boy samurai is sure to win.