A group of young people stuck in the small Texas town of Fossil Ridge have to fight for their lives against dinosaurs that have been reanimated by a local scientist.

Armed with an explosive powerful ancient cross amulet, Callan is back with his extraordinary team of weapons experts to defend Los Angeles from its biggest threat yet—super villains Muerte and Drago. Callan will have to join forces with his once mortal enemy, Gunnar, to try to save the city.