The swamp folk of the deep Okefenokee live a brutal primitive life untouched by modern times - they support themselves by hunting alligators and selling them to the outside world. Jeff returns home from college with an engineering degree and dreams of bringing modern medical care and education to the swamps. He is immediately confronted by his old boyhood rival, "Gator-Bait" Blair, who thinks things are just fine the way the are. "Gator" whips the ignorant locals into a frenzy of fear and resistance. When Jeff is unintimidated by their threats, Blair sets out to stop his plans once and for all - with a rifle.

A petty thief schemes a big score when he plans an armored car robbery.

During World War II, an American bomber pilot is rescued after drifting at sea aboard a raft. After being administered truth serum, he tells the doctor a story of how he and the three survivors of his plane crash washed up on an island that was inhabited by a tribe of beautiful primitive cave-women, dinosaurs and a group of savage cavemen who are bent on abducting the women for breeding purposes.

The CIA sends playboy Mike Trent to Alaska with agent Vee Langley, posing as his "nurse," to investigate flying saucer sightings. At first, installed in a hunting lodge, the two play in the wilderness. But then they sight a saucer. Investigating, our heroes clash with an inept gang of Soviet spies, also after the saucer secret.