El mundo vive asolado por una epidemia, pero los científicos no son capaces de encontrar una cura para erradicarla. Se sabe que el doctor Josué Herrera descubrió un tratamiento en 1871, pero, al parecer, pereció en el gran Incendio de Chicago. Unos científicos, que han ideado una máquina del tiempo, le proponen al doctor Clint Earnshaw que viaje hasta 1871 y obtenga muestras de la cura de Henderson. Earnshaw y su colega realizan el viaje en el tiempo hasta 1871 pero, por un error de cálculo, llegan la víspera del terrible incendio.
The U.S. submarine Anthony Wayne is underway for a top-secret mission. Onboard is a highly classified device that will give the Americans a decided nuclear advantage. The entire mission and the secret technology are threatened when the sub commander discovers his crew has been infiltrated by enemy agents. The commander is charged with trying to protect the device while ferreting out the enemy agents. Compounding matters is the state of the commander's physical and mental condition, which is being questioned by his crew.
In this exciting jungle adventure the esteemed archaeologist, Dr Singleton, and his daughter, Mary, travel to mystical Africa in search of an ancient artifact: the fabled Blue Stone of Heaven. Imbued with the unfathomable power to bestow its holder with immense strength, the statuette attracts corrupt Colonel Tatakombi, who, blind with greed, intends to spark an uprising, and turn the natives against Tarzan. Can mighty Tarzan avert the jungle rebellion?