Annie befriends Keela, a sorceress banished to the Land of the Lost by an evil king. Keela uses her magic to entertain the Porters and turn Tasha into a taking dinosaur. But trouble follows: Keela is being pursued by Magas, a one-eyed beast who had been an evil sorcerer untill Keela turned him into a monster.
The Porters come apon a suburban street, right in the middle of the jungle, complete with their house But the house turns sinister. Tasha is attacked by the refrigerator, the furniture menaces the kids and Tom's leg is pinned by the garage door. They ultimatley discover an old Sleestak machine is responsible for creating the illusions.
Kevin and Tasha find Opah, an old Paku who is Stink's grandfather. Stink is embarrassed by his grandfather's ways, especially his ""musica"", a wooden flute that has a hypnotic effect on the dinosaurs. But Stink changes his tune when Scarface threatens the family and Stink must use Opah's flute to save the day.
Shung uses his crystal on Christa to place her under his control and uses her to summon the Porters. When the family arrives, the Sleestaks capture them and lead them to an amphitheater where they are forced to fight each for Shungs entertainment.
Stink shows the Porters, Tasha and Christa a beautiful beach, but the place makes Christa uncomfortable. While there, Annie befriends a ""fish-man"" creature named Namaki, who helps Christi recall the night she was separated from her family and left in the Land of the Lost.
After an argument with her father, Annie heads for the jungle, where she meets Simon Cardenas, who just arrived from the future. Simon had borrowed his father's time belt to take a joy ride, only to collide with another time traveler, a dangerous alien cyborg. The collision dumped them both in the Land of the Lost.
The Porters, Stink, Tasha and Christa spend the day on the beach with Namaki. But one by one, the Porters vanish without a trace as hypnotic music plays. Namaki, Tasha and Stink search for them and find that the Porters are being held by a shape-shifting siren (imprisoned by a serpent) and she wants them to become her family.
The Porters form an uneasy alliance with the dinosaurs.
Annie leads the group, but is she cut out for it?
The Porters are captured.
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The Porters find a sorcerer who has stumbled into the land of the lost.
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