During the Edo period, Bunzō (Gōda) used to be the strongest street fighter. However, ever since the Torazō (Kumada) family began engaging in evil deeds, he has lost his power and even found himself bedridden with disease. While the Torazō family continued their wicked ways, a vagabond named Kunimasa (Kunio), entered the scene! He had come to repay the good turn he owed to Bunzō for his earlier kindness, but when Kunimasa arrived, he was instead met by Bunzō's only daughter, Okoto, and her stuck-up fiancé!

What's more, a mysterious duo suddenly appeared out of nowhere and kidnapped Okoto! To rescue her and save the Bunzō family, Kunimasa goes on an adventure with his sidekick, Tsurumatsu (Sonokawa).