A New York University professor returns from a rescue mission to the Amazon rainforest with the footage shot by a lost team of documentarians who were making a film about the area's local cannibal tribes.
A scuba diving instructor, her biochemist boyfriend, and her police chief ex-husband try to link a series of bizarre deaths to a mutant strain of piranha fish whose lair is a sunken freighter ship off a Caribbean island resort.
In the 1950s, a horror-comic artist's creations come alive and kill him. Years later a new cartoonist revives the creatures in his house, now part of an artist's colony.
