Little Buddy is a proud Tyrannosaurus Rex living happily in the Pteranodon family nest. But, what exactly makes Buddy a part of this family, and just what will happen when he gets bigger and can't fit in the nest anymore? Buddy wants to know, so the Pteranodons decide to hop aboard the one and only Dinosaur Train and set off on an adventure across the Mesozoic to take Buddy to see his good friend King Cryolophosaurus. King's giving a big concert in Troodon Town and will be a great pal for Buddy to talk to and figure it all out. But, oh no- King is missing! Will Buddy and the gang be able to find him in time for his concert? Just why is King hiding anyway? And will Buddy discover what makes him special and such an important part of the Pteranodon family? Let’s all take a ride on the Dinosaur Train to find out, together!