Eccentric millionaire John Hammond has invited three dinosaur experts see his new amusement park before it opens. The park is on an island off Costa Rica and is populated by actual, living dinosaurs that Hammond has created using DNA harvested from pre-historic insects. The scientists are joined by Hammond's two grandchildren during their preview of the park and the group is enjoying the tour in their computer-controlled cars until a storm knocks out power on the island. A park employee who wants to steal some of the dinosaur embryos takes advantage of the situation and sabotages the system, inadvertently causing the gigantic beasts to go on a rampage and forcing all the humans on the island to flee for their lives.

A group of guests is previewing a new amusement park populated with living dinosaurs when the system is sabotaged. The dinosaurs go on a rampage and the humans must flee for their lives.