Tom and Jamie can't believe their luck when they find a secret entrance to a prehistoric world filled with dinosaurs! They vow to go back and have a new adventure every day.

This time, it's a rescue mission: A quetzalcoatlus has dino-napped their friend the wannanosaurus. With a wingspan of 40 feet, the quetzalcoatlus is a high flier--and a fast one. Tracking Wanna won't be easy, but Tom and Jamie have a plan . . .