Fuu Kasumi is a young and clumsy waitress who spends her days peacefully working in a small teahouse. That is, until she accidentally spills a drink all over one of her customers! With a group of samurai now incessantly harassing her, Fuu desperately calls upon another samurai in the shop, Mugen, who quickly defeats them with his wild fighting technique, utilizing movements reminiscent to that of breakdancing. Unfortunately, Mugen decides to pick a fight with the unwilling ronin Jin, who wields a more precise and traditional style of swordfighting, and the latter proves to be a formidable opponent. The only problem is, they end up destroying the entire shop as well as accidentally killing the local magistrate's son.