When young paleontologist, Ryan Thompson, finds a new species of mosasaur in Cretaceous seaway sediments, he is thrilled. The discovery should jumpstart his career. Joy quickly turns to fear when he touches an artifact buried among the sea reptiles ribs. Suddenly, he must fight a mental takeover by an alien intelligence committed to transforming the Earth into a refuge for her own race. As Ryan and his girlfriend, Skeets, attempt to thwart alien plans to colonize Earth begun in the deep past, even this crisis becomes trivial. The uneasy symbiosis of Ryan and the alien, Siu, generates a new entity with the power to transform the entire universe.