Cheung and Lau are two men who grew up together as brothers. However, they end up as enemies who hunt each other down after following different paths in life.

In 16th century, during the Ming dynasty era, every ten years the greatest swordsman from Japan faces the greatest swordsman from China in a duel to the death for their nation's honor. As a duel approaches, Chinese champion Bo Ching-Wan and Japanese champion Miyamoto uncover a plot to rig the fight.