Sheik El Sahid has built a theme park at the underground holy City of the Dead in Egypt that an earthquake has revealed. Two American publicists are brought over to make it a success, to advertise its fantastic mechanised speaking mummies. The place soon appears to be cursed especially when the ancient mummies begin breaking free and wreaking havoc.

Five teenagers embark on a boating trip off the coast of Florida. The teens get hopelessly lost at sea after they get caught in a fierce storm. Fortunately, the quintet stumble across an abandoned yacht in the middle of the ocean with a mysterious biology lab on board it. Unfortunately, there are also ferocious mutated prehistoric fish running amok on the yacht. Will any of the teens survive this harrowing ordeal?