Plot Synopsis

When a delivery truck carrying a cargo of dangerous genetically altered snakehead fish crashes in the Louisiana swamps, it seems the local Blackbriar voodoo curse has struck again. Loosed into the ecosystem, the fish quickly stake their claim, rising to the top of the food chain before setting their sights on devouring the human population. Trapped in a nearby swamp during a weekend getaway, teenager Chris Hardin and his friends are forced to overcome their differences in order to fend off the mutated snakeheads. Meanwhile, Chris' mother Ranger Carly Hardin and his college-professor father race to save him from the deadly serpents.