Several years ago, the English archaeologist and millionaire Reginald Kensington disappeared without a trace in the mysterious city of Ubar, lost in the Arabian Desert. After a strange explosion in the gallery founded by Kensington, where treasures from Ubar were kept, scientists discover inside a stone statue damaged by the blast a strange metal part—an exact copy of a human heart. The archaeologist’s daughter equips a scientific expedition with the aim of penetrating the mysteries guarded by the desert. However, the explosion attracts the attention not only of scientists, but also of an international criminal group seeking to seize a certain mysterious force hidden somewhere in the underground chambers of Ubar.