Denver and the group deck out in wild caveman attire and form a rock group, B.C Rock, to compete in the city wide talent contest, as does Freddy Facknitts (by forming a group of robots called Roborock). However, Dr. Funt and Morton Fizzback kidnap the robot band and Denver and the gang must rescue them.

Denver practices his magic act for the Charity Carnival when he and the gang get more than they bargain for. When Denver wins a rare historical artifact that was mistakenly donated for the raffle, he finds himself on the run from the shady Bird family who are out to get their priceless piece back.