Set in early 21st century Earth, Charles Weyland, an industrialist billionaire, leads an archaeological expedition to Antarctica. Using thermal imaging satellites, Weyland believes to have discovered the ruins of an ancient pyramid temple buried under the ice, predating even the Egyptian and Aztec pyramids.
Once inside, the team finds the remains of Humans with holes in their ribcages, along with the remains of Facehuggers -- meaning that the possibility of the temple being uninhabited is very unlikely. To make matters worse, five teenage Predators are coming to the temple to perform a coming-of-age ritual that involves fighting to the death with the Aliens.
Soon, it becomes clear that only one species is getting out alive.