A Navy expedition led by Commander Hal Roberts explores a mysterious warm-water region shrouded in the ice of Antarctica. When a fierce storm drives them into a cloud bank, their helicopter is disabled, and they encounter a hot, tropical landscape of prehistoric terror! Untouched by the Ice Age, a 20th-century Mesozoic era awaits them, complete with ferocious dinosaurs and carnivorous plants. © 1957 Universal Studios. All Rights Reserved.