Josh, Mark, Angela and their friends have been waiting for years to go on the class trip to Drumheller, Alberta. Now they are finally the oldest kids at Pleasant Valley grade school and can get excited about the overnight outing. But first, they have a lot of learn about what they'll see in the dinosaur capital of the world. And they have to raise money for all the pizza they are going to eat on the trip! Once they finally get going, a frightening encounter with a slithery serpent leads to an amazing discovery. One that might be even better than all-you-can-eat deep dish!