The Mississippi River is notorious for holding catfish pushing triple digit weights, flesh-eating alligator gar over two-hundred pounds, water moccasins, alligators, and even bull sharks. Top to bottom, it’s a river teeming with top-tier predators. But there’s something else in the water, something far more ancient and evil, something that has been dormant for thousands of years. Now, as Jed Wilkes, a New Orleans casino baron, prepares for the grand opening of his greatest endeavor yet—a floating casino on the Mississippi—these primordial river monsters are just waking up. Faced with losing his lifetime dream, Jed must team up with his ex-wife’s new husband, Louisiana’s greatest big-game hunter, to track down and kill off the river monsters before opening night.