The local police prove unhelpful when a 500-pound dinosaur skull vanishes from a secret excavation on Sage's family's ranch, so Teddy and his friends conduct their own investigation.

The year is 1876. Among the warring Indian tribes and lawless gold-rush towns of America's western territories, two paleontologists pillage the Wild West. They are hunting for dinosaur fossils, while surveilling, deceiving and sabotaging each other in a rivalry that will come to be known as the Bone Wars. Into this treacherous territory plunges the arrogant and entitled Yale student William Johnson. Determined to survive a summer in the west to win...