The Civil War is over but in the Ozarks of Arkansas people are not ready to forgive and forget. The Mondier brothers have returned from fighting for the Union and Mort Fagan is keeping things difficult for them in the community.

A trio of hunters in the Louisiana bayous capture a monster called the Swamp Thing. They take it to New Orleans where (naturally) they display it in a strip joint. When the monster's favorite stripper gets into a fight with another stripper, he breaks loose and starts killing.