One hundred years after a nuclear war has devastated the planet, society has been reborn into two factions; the underground society and the scavangers above in the wastelands. A group of scavangers on bikes come across a town infested with flesh eating rats, and soon the gore is spilling everywhere.
A marine biologist, a dolphin trainer, a research scientist, and a local sheriff try to hunt down a large sea monster, a shark/octopus hybrid, that is devouring swimmers and fishermen off a south Florida coast.
Hanna is a girl completely abandoned to herself, is not at all inhibited sexually, and is attracted to the attention of unscrupulous people like Miguel, who takes advantage of Hanna, turning her to prostitution to obtain her drug fix. Until she meets Alex, a young man with a sincere affection for Hanna.
