Melvin, a reluctant Superhero, lives only for crime, women and drugs - until he realises that the only way he will ever get to see his estranged son is to go straight and fulfil his potential as a crime fighter.

An animal smuggling deal goes wrong, resulting in a large shark escaping into the swampy backwoods river.

When a young woman comes home from college to her family, mutated alligators start attacking her kin and the rivaling family in the bayou. They must overcome their feuds and fight together against the redneck gators.