Mugen, a ferocious warrior with a fighting style inspired by break-dancing, and a lone swordsman, Jin, agree to join ditzy Fuu as she searches for a samurai who smells like sunflowers.
Fuu is a part-time teahouse worker whose life changes forever when two vagabond warriors, Mugen and Jin, stumble into her place of business and end up in hot water with the local magistrate.
When Mugen wounds Ryujiro's arm, it sets off a dangerous chain reaction. Fuu is kidnapped, and two deadly assassins are dispatched to make short work of vagabond Mugen and ronin Jin.
After leaving the domineering Fuu behind, Mugen and Jin arrive in town. Once there, it's not long before they're hired on as bodyguards by the two groups that run the city.
The paths Mugen, Jin, and Fuu follow bring them together again, but their reunion is put on hold when an untimely mistake intensifies the struggle between two groups fighting for control of one city.
Unable to pay for a small ferryboat, the three go their separate ways into town to make some money for the fare. Fuu picks up a modeling job which turns out to be a trap.
Mugen and the others finally arrive in Edo and find themselves participating in an eating contest. While on a tour of Edo led by a stranger named Joji, they get chased by a concentric group of foreigners and mysterious Zen priests.
Mugen and the others are planning to feast on some good food for a change, but in that split second they are caught off guard, and a pickpocket named Shinsuke steals their precious wallets.
Nagamitsu, a self-proclaimed shogun-to-be, meets Fuu and the others at a restaurant. Fuu learns he is looking for a man who supposedly murdered a legendary swordsman in a cowardly manner and that man was a glasses-wearing samurai and his name was "Jin."
The crew is headed for the gallows after getting caught flashing fake travel permits, but Mugen can win back their freedom by out hustling a deranged gang of warrior priests.
In a certain post town, many samurais are being killed to test a new sword. When Fuu and the other two learn of a monetary reward for anyone who finds and captures the murderer, they put aside their part-time work and rush off to catch the killer.
Fuu and the other two come to a standstill in a certain town, where the three decide to find some part-time work. Jin becomes a vendor pulling a cart, where a woman tells him she is set to begin working in the red light district starting the next day.
The three get to stay at an inn after a long time. While Fuu takes a bath, Jin and Mugen find Fuu's diary and decide to sneak a look at it. In the diary, they find her frank entries on such topics as guys, food and their trip.