The mystical country of Nipon, where past and future mingle.

A mysterious group, the "Ankoku-tō," led by "Nuehime," has been seeking the "Orb of the Sky" in Nipon for some time.

Meanwhile, our hero, "Shimmen Takanoshin," was working a part-time job with his childhood friend "Noichigo" to fund his journey to become a samurai. It was then that the Ankoku-tō attacked Noichigo's shrine.

Meanwhile, our hero, "Shimmen Takanoshin," was working a part-time job with his friend "Noichigo" to fund his journey to become a samurai. It was then the Ankoku-tō attacked Noichigo's shrine.

"Shimmen Gōtetsu," Takanoshin's father and a master of the Shimmen-ryū sword style, confronted the Ankoku-tō to save an old friend but was defeated by Nuehime's bizarre magic.

Just then, the Ankoku-tō stole the shrine's sacred object before Takanoshin's eyes.

— The sacred object's name was the "Orb of the Sky (sky)" —

Though no one could use its hidden power, it was undoubtedly a "Orb of the Sky."

Takanoshin, taking his injured father's place, sets out with Noichigo to retrieve the magic crystal and confront the Ankoku-tō.

This was the beginning of Shimmen Takanoshin's turbulent journey.