 65 million years ago, a meteorite crashes into the Yucatán Peninsula, subsequently wiping out the dinosaurs and paving the way for humans. Now, in 2000, an island emerges where the meteorite is thought to have landed, and is granted the name "Dinosaur Island." A biotech corporation then takes up shop on the island. In 2018, Eliot Ballade, an elite member of the ESER forces, is vacationing near Dinosaur Island when something mysteriously falls from the sky and leaves the island sealed under a mysterious dome of energy. When a mysterious, ethereal being called Nephilim shows up to chase Ballade, he takes it upon himself to solve the enigma of Dinosaur Island.