Tiny robot bears solicit the help of the ThunderCats to save them from a slave trader named Conquedor who values their technical and construction skills. The Cats help to rescue enslaved Berbils and defend their village. Panthro learns that's he's not the only "wrench monkey" and bonds with Ro-Bear-Bill even when they come up with a way to drive away the Conquedor, the Trollogs, and the Giantors.