An explorer braves encounters with dinosaurs as he leads an expedition to the mysterious island prehistoric island to rescue his marooned naval officer friend from a forgotten civilisation. Fantasy adventure sequel to The Land that Time Forgot, starring Patrick Wayne, Doug McClure and Sarah Douglas.

Major Ben McBride organizes a mission to the Antarctic wastes to search for his friend who has been missing in the region for several years. McBride's party find themselves in a world populated by primitive warriors and terrifying prehistoric creatures, all of whom they must evade in order to get back safely