The story follows a rescue expedition, led by Patrick Wayne in search of his friend, played by Doug McClure, who had vanished many years before.

Major Ben McBride (Patrick Wayne) organises a mission to the Antarctic wastes to search for his friend Bowen Tyler (Doug McClure) who has been missing in the region for several years.

McBride's party: the paleontologist Norfolk (Thorley Walters), gunner and mechanic Hogan (Shane Rimmer) and photographer Lady Charlotte 'Charlie' Cunningham (Sarah Douglas) fly over the mountain wall of Caprona in an amphibious aircraft, but are attacked by a fierce giant pterodactylus and forced down.

They find themselves in a world populated by primitive warriors and prehistoric creatures, all of whom they must evade in order to get back safely to their ship.

The reviewer however, found that "A few shots, composed around celebrated fantasy illustrations, compensate for all the film's shortcomings";[7] and critic Derek Winnert similarly opined "the monsters and special effects are below par," but "there are effective moments, and there is some curiosity value in seeing singer Dana Gillespie playing Ajor";[8] while Blu-ray.com thought the film "may not be the most polished effort around, but there's fun to be had with its crazy dino encounters.