A young car learns the importance of family when he embarks on a mission to rescue his father who's been sent to Clunker Island to be re-purposed as junk metal.

Fenn the Troll hates the Troll pastime of pranking, and is teased so much for it that he runs away. But when a long-suffering park ranger starts capturing the other Trolls, it's up to Fenn to rescue his family and friends.