Sean Duggan journeys halfway across the world to Thailand to investigate the Giant Snakehead Fish in its native habitat. A territorial, apex predator with a snakelike body and extreme adaptability, the Snakehead Fish has wrecked local fishing industries and left devastation in its path. Having spread all the way to the United States, Sean's expedition takes him from Thailand to Snakehead-infested Arkansas to see if this killer fish can be stopped.