A group of soldiers attempting to rescue a hostage from a terrorist crash land into unfamiliar jungles which are inhabited by a group of long hidden dinosaurs.

While returning from a military expedition a helicopter crash lands a commando unit in a dense, remote tropical jungle - a lost world populated by dinosaurs. Now they must find a way out of this isolated valley before becoming prey for prehistoric predators.—Michael Holt

After crash-landing somewhere in the inhospitable jungles of South America, Professor Roxton and a highly trained squad of commandos find themselves marooned on a dangerous place rife with dinosaurs. As the survivors try to rescue the captured scientist, Angeles Ibanez, from the clutches of the rebel leader, Marquez, more and more, they realise that there's no easy way out from this cut-off prehistoric world. Is there an escape from the land of the living primaeval predators?—Nick Riganas