Penny, the niece of the inspector hais now 16 years old and the dog Sultan is smarter. Marhham, the mayor of Metro City has decided that the town needs a tourist attraction. The mayor believes that their problems will be solved when he finds under the Metro City Jail an egg of a prehistoric giant lizard, in perfect condition. But Dr. Claw and his henchmen steal the egg with the intent to use it for world domination.

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