Tor and Little Rok are flying to the village of the Valley People to surprise Sheera who has been visiting them for several days. When they arrive they discover that the village is deserted. When they begin their investigation, Tor suddenly disappears leaving his club behind. Tog grabs the club knowing that Tor will need it to turn into Mightor if he and Little Rok are able to find him. They discover that Rogg and the Stone Men have kidnapped their friends. Rogg plans to use them as slaves to build a Stone Dinosaur of War. Tog gets the club to Tor. Will Mightor be able to save his friend and the villagers?