Having defeated the Campaigner in the original Turok: Dinosaur Hunter, Turok attempts to destroy the Chronoceptor by throwing it into a volcano. In doing so, Turok unwittingly awakens an even more deadly foe--The Primagen--who lies imprisoned in a spacecraft buried at the core of the lost land. Turok must stop the Primagen from escaping his prison and breaking through the wall dividing the nether world from Earth!