Race-car driver Blaine Striker grows concerned about his younger brother, a student at a medical school on the Caribbean island of St. Heron. General Turner has led a violent coup on this island and may be planning to blow up the school in order to blame the destruction on counterrevolutionaries. Striker infiltrates St. Heron, is captured, stripped to his tighty-whiteys, and electrotortured. He escapes, joins forces with the counterrevolutionaries, and foils a plot to assemble Russian missiles on the island.
An adventurer (Hamilton) decides to go in search of the lost city in the Amazon jungle. A motley crew of other people with reasons of their own decide to join him for the wealth of the lost city. But to their horror they find out that they have bit off more than they can chew. What with a nazi doctor still doing his experiments on people in the same place.
A bounty hunter protects his dead brother's wife in a lawless world after a comet has devastated much of earth.