An earthquake has revealed an underground City of the Dead in Egypt. It is a holy place and is cursed but this doesn't stop Sheik El Sahid from building an underground Mummy Theme Park there! Dan and Julie are brought over from the United States to publicise the new venture and the Sheik shows them how he has made the original mummies into bionic talking beings by implanting microchips in their heads. But the mummies react aggressively to the bright lights - they snap off their restraints and threaten Dan and Julie. Even the Sheik and his men are not safe as more and more mummies break loose and attack!