After a ruler dies, tradition dictates the new ruler must accomplish a series of harrowing challenges whilst competing with other aspirants. One of them, Nasu a young prince, engages in the contest, but evildoers plan the young prince's demise. Tarzan protects him while ensuring he meets the tests

The mummy of long dormant, but powerful Caribbean voodoo priest Gatanebo gets revived on a luxury South Seas ocean liner as a big buff bald guy and proceeds to terrorize the passengers. Gatanebo beheads several folks, occasionally reverts back to his prune-faced mummified state, and falls for the ravishing Sylvia, who reminds him of his old flame Kenya.

Dr. Frosta dumps body parts and corpses in the marsh, where they rise up again for vengeance.