Aeneas, a Greek warrior, battles the leader Paris in order to find his kidnapped, pregnant wife and join the fighters of the Trojan Horse.

A group of college students travel south to Florida on spring break with their friend Karen, whose father, Dr Richardson, is a marine biologist currently studying jellyfish. At the party, Karen's friends insult and ridicule Dr Richardson's assistant, Egon, who is in love with Karen. Egon creates a murderous jellyfish mutant which begins a killing spree and eventually brings Karen to his secret laboratory in the swamp.