Katsumi Kirifuda is a passionate boy who aims to become the best duelist in the world. Then, Knight, Asia's strongest duelist, appears before him. Knight invites Katsumi to a duel, this encounter will greatly change Katsumi's destiny.

A beautiful girl, Mimi Tasogare, who is good at karate, transfers to Katsumi's class. Katsumi and his friends enjoy dueling together, but the evil hand of an assassin sent by the mysterious dueling organization, the Temple, closes in on them.