Lola receives an invitation from the museum to attend the premiere of an exhibition about extinct species with one of her friends. She invites Victor, who is far from enthusiastic. When they arrive, the museum director gives the children two replica dinosaur eggs that they have to deposit inside the pterodactyl's nest. But as usual the Guanos get it mind that the eggs belong to their ancestors. They try to steal the eggs, convinced the powerful spirit of their ancestors will enable them to dominate the world. With no animals allowed inside the museum, Pat use all his cunning to find a way in and retrieve the eggs.