A quarry in south central Colorado is found to hold the remains of four different species of dinosaurs. Two are docile herbivores: Camarasaurus and Stegosaurus. But the others remains are those of predators: Allosaurus and Ceratosaurus. Many of the bones have the telltale signs of bite and claw marks. By comparing the size, depth and shape of the marks and comparing them to the teeth and claws of the predators, experts are able to identify which of the dinosaurs is responsible for the grisly act of carnage. Then, using the forensic evidence found at the site, and intriguing new results learned through CAT scanning; they are able to reconstruct a battle that took place between the two predators, in a fight for dominance.