Just as Ty Rux welcomes a loud and smelly Stegarbasaurus to the crater, Revvit disappears and the gang sets out on a dangerous rescue mission.
The Dinotrux welcome a new member, a Stegarbasaurus named Garby, in their construction efforts to keep their food safe. However, he accidentally eats Revvit due to his fondness for rocks and the mishaps leads to them being trapped in D-Structs' cave.