A band of adventurers invade a native island determined to grab a reported fortune in buried treasure.

Grier and Haig are thieving mercenaries who engineer a prison break from the outside.

A kidnapped diver is taken to an island inhabited by a mad scientist and his half-animal, half-human creations.

Satan saves Joseph Ashley from death on the condition that he become his disciple (and, as it turns out, a hairy murderous beast).