Against all logic, the competitive swimmer, Haley, drives into the mouth of a furiously destructive Category 5 hurricane on a collision course with her hometown of Florida, to check in on her estranged father, Dave. There, in their weather-beaten house amid a rapidly sinking and alligator-infested town, Haley and her father find themselves trapped in the labyrinthine mess of their flooded crawl space, where a merciless pair of six-metre predators is silently stalking them. Now--as Haley and Dave are gasping for air in the claustrophobic basement--only their will to survive can help them stand a chance against the scaly adversaries' powerful jaws. Can they escape without getting eaten alive?