A westerner named Casey, studying Ninjutsu in Japan, is asked by the Sensei to return to New York to protect the legendary Yoroi Bitsu, an armored chest that contains the weapons of the last Koga Ninja.

After a tragic accident Luke Gibson is left with critical injuries and complete amnesia. A new technological breakthrough from the Hexx Corporation - a Psi-Comp Implant that's hardwired into Luke's brain - saves his life, but Luke soon finds out that this new technology comes with a price and that the Hexx Corporation harbors sinister plans for the new device.