A young female samurai comes upon a dying messenger and agrees to deliver the scroll he was carrying to its destination. However, unbeknownst to her, the scroll is actually a formula for a new kind of gunpowder. An evil clan that is planning to overthrow the Emperor is also after the scroll, and they try to take it from her.

Hanpei is a gentle young samurai that loves flowers. One day, he witnesses an old man's quick draw of the sword. He is so impressed that he becomes the old man's pupil. Soon, Hanpei's skill of sword comes to attention of his lord. The lord orders him to assassinate a man...