After decades of hurricanes and oil spills, Louisiana faces a new threat - hordes of monstrous 20 pound swamp rats. Known as "nutria", these invasive South American rodents breed faster than bounty hunters can "control" them. With their orange teeth and voracious appetite they are eating up the coastal wetlands that protects Thomas and his town of Delacroix Island from hurricanes, but the people who have lived here for generations will not give up without a fight.

美国路易斯安那州可谓多灾多难之地，除了之前遭遇过的飓风和原油污染，这次是罕见的硕大鼠灾——老鼠大到10公斤一只！这些老鼠是从南美洲来的，不仅个头大，繁殖力又快又强。它们长着橘黄色的牙齿，几乎什么都吃。然而，当地居民也不是好惹的，所以人和鼠之间展开了一场大战。