Vaz's big sister Teresa is home from college and ready to dig for dinosaur bones & fossils on Birdwell Island! Who more perfect to help her dig than Clifford and his dog friends? Everybody has great luck digging up fossils that will complete a dinosaur skeleton that Teresa is piecing together – everybody but T-Bone that is. But by believing in himself, T-Bone ultimately comes up with one of the most important bones needed to complete the job.