Angelo lost his dog, Pookie Paws, at a nearby and abandoned mine. His grandfather used to work at that particular mine. Jett agrees to help Angelo and his grandfather, in order to search for the missing dog. They ride on a minecart to one of the passageways. After finding the dog, they started to head for home. However, one of Jett's wings chopped off a boulder and it activated the track switch in front of them. To make things worse, that wrong track led them to a "roller coaster ride" and towards a cliff with no bridge. Jett saves everyone from going over a cliff, but they are lost inside that part of the mine. Can they escape from there and see sunlight again?