In the 4th Century, an evil Tengu known as the Shredder began to wreck havoc across Japan, and planned to dominate the world. The Emperor summoned Japan's greatest warriors, Kon, Juto, Chikara, Hisomi and, the most skilled, Oroku Saki. Armed with mystical armor, the five warriors battled against the Tengu Shredder. The fight ended when Saki managed to topple the demon and was poised to finish the job when the demon communicated with him on the astral plane, and offered him power and the world in exchange for his soul. Immediately, Saki's dark side allowed the Shredder's soul into his own before Saki destroyed the Shredder's empty husk.