This is an adventure/horror movie about a small group of treasure hunters. They are excavating a cave in the mountains of Greece, where a rich treasure of stolen artwork is said to be hidden. Despite warnings from the locals that the cave is cursed, they continue to look for the treasure. One of their explosions accidentally releases an invisible shrieking dinosaur that has been buried for eons. The recently hatched dinosaur terrorizes the people on the expedition, killing many of them as the opportunity arises. This is a pretty cheesy movie, but the suspense is actually good in places. Interestingly enough, this movie starred two actresses who would go on to become cult stars of European horror movies: Soledad Miranda and Ingrid Pitt.