It's the year 2029 A.D. and a madman controls the largest city in America. The Emperor Garuda and his followers fave built an impregnable stronghold as a monument to his evil. Conventional forces have been unable to stop his malevolent plans for total control. But Garuda is worried...

Reports have reached him that two figures have breached the outskirts of his city defenses. For the first time he feels an inner chill, for he knows that the invaders are Ninjas.

Hayate and Lady Kaede are ninjas of the Iga clan. Their mission is to infiltrate the fortresses of Garuda and destroy his wicked empire.