It's a normal morning at the Kokuni clinic. Dr. Genzai has just woke up and is preparing to wash himself with a bucket of fresh water. However, as he spills the water all over his body, his back is strained and he can no longer move. Naturally, the job of running the clinic has now been handed down to his assistant, Megumi. Helping Megumi are Yahiko and Kauro, who volunteer out of good will... But it seems like they are causing more harm than good. Sanosuke and his friends suddenly enter the clinic, carrying an injured man on their shoulders. It appears the guys from the Hishimanji gang attacked him with a wooden cannon! The man is all bruised up, but after a long night of treatment, Megumi had managed to save his life. Word spreads throughout the area about the talented, beautiful lady doctor working at the clinic.
As Yahiko and Megumi walk back to the clinic after treating a rich girl named Kanekura Kaeda, they come across a man who falls down, claiming to have intense stomach pains. After hearing all of the rumors, the crowd surrounding the man is sure that Megumi's going heal him. But to their surprise, Megumi just touches his forehead and leaves, saying that she can only heal the sick. Kauro, and later on Sanosuke, arrive at the scene just in time to see all the commotion; A tall man called Raikou has managed to put some kind of a spell on a cup of water, and using the water he healed the sick man. The crowd's response is overwhelming: After seeing such act of magic, everyone insist that Raikou would come to their house and heal the sick people there!
At the Hishimanji headquarters, Raikou and the hoodlum gang are sitting in front of a fire, discussing their secret plan. It appears that they are planning to use Megumi's current popularity against her and spread lies about how she does not treat those in need (like that guy with the stomach ache earlier). Obviously, they will charge money for Raikou's alternative treatment and make themselves a hefty profit on the account of needy people.
Exactly as the rumors about Megumi being a great doctor spread earlier, the rumors of her being a quack spread just as fast. Over at the Bronze, Gold and Silver Exchange, where Megumi recently treated Kaeda, the Hishimanji decide to go against the lady doctor's advice of not moving Kaeda and decide to transfer her to a secret location, where Raikou will give her his special holy water treatment. Both Megumi and Yahiko try to resist the Hishimanji men, but they are just too many and too powerful for a woman and a 10 year old boy to handle. As the Hishimanji's carriage leaves with the sick child, Yahiko follows it in order to find out exactly what's going on.
Megumi and Yahiko track the Hishimanji at some mysterious house, where Raikou was just in the midst of his worthless prayer. Megumi tells Kaeda's worried parents that what will heal their child is not the power of money. They ask her about the sick man she abandoned in the street and she tells them that he was faking it. That same man, who was pretending to be sick earlier, just entered the room, wearing a Hishimanji uniform. Soon enough, more Hishimanji join him and stand at the door, ready to kill Yahiko and Megumi. However, Sanosuke stops their fun as he beats them all to a bloody pulp as revenge for his friend they nearly killed with their wooden cannon. Inside, Yahiko manages to kick some booty as well. And as the last of the Hishimanji falls, Megumi starts treating Kaeda with real medicine. But it's not over yet! More Hishimanji men arrive, and this time they have their notorious wooden cannon with them to boot! They shoot a few cannonballs at Raikou's mansion, but luckily they don't hit anyone... But if things continue the way the are they will hit somebody eventually. Just at the nick of time Kenshin arrives, determined to save the day. They shoot a cannonball at him, which he manages to cut in half using his Sakabatou and then proceeds to defeat the entire group with the greatest of ease. After all the mayhem, Raikou asks Megumi for help because he feels his stomach aching. Megumi agrees to help him only if he admits publicly to being fake. He gives her a document, confirming that he is fake, and Megumi gives him his promised treatment; A cup of water for an imaginary stomach ache.
It seems that now Megumi's popularity has skyrocketed. Even though Dr. Genzai can now stand up and deal with patients, nobody wants to see him. They all want a visit from the beautiful lady doctor.
