Welcome to one of America's last frontiers: the wild swamplands of Southern Louisiana, a place whose history stretches back to the 17th century. It's the start of the most exciting-and dangerous-time of year for the swampers, the month-long alligator season. During this 30 day window, swampers make most of their annual income culling gators. Follow these swampers through a time of year that is crucial to their survival: the 30-day alligator hunting season. At its core, this is a uniquely American story of a proud and skillful people fighting to maintain an ancient way of life in a rapidly modernizing world, despite the many perils and trials that stand in their way.

As a result of an arctic nuclear test, a carnivorous dinosaur thaws out and starts making its way down the east coast of North America. Professor Tom Nesbitt, only witness to the beast's existence, is not believed, even when he identifies it as a "rhedosaurus" to paleontologist Thurgood Elson. All doubts disappear, however, when Elson is swallowed whole during an oceanic bathysphere excursion to search for the creature. Soon thereafter the rhedosaurus emerges from the sea and lays waste to Manhattan Island until Nesbitt comes up with a plan to try to stop the seemingly indestructible beast.