The ghost of a serial killer, executed for murdering students at a Catholic girls' school, returns to the school to take revenge on the current student body.

The bodies turn out to be very radioactive. A sheriff and reporter start to investigate ...

Photojournalist Bo (Griffin O'Neal) and his girlfriend Angie (Tawny Fere) are captured and falsely imprisoned in Colombia. Angie's Sheriff / cowboy father Jethro (Richard Lynch) vows to use every method at his disposal to secure their freedom.

An adventurer (Hamilton) decides to go in search of the Lost City in the Amazon jungle. A motley crew of other people decide to join him for the wealth of the city, for reasons of their own. But to their horror they find out that they have bitten off more than they can chew, what with a Nazi doctor still using the place for his human experiments.