Two brothers on an overnight fishing trip encounter a macabre family that compels the brothers to fight for their survival in a Louisiana swamp.

Brothers, Billy and Kenny haven’t spent much time together since Billy went off to war in Afghanistan. Kenny stayed home and went to seminary. They decide a frog gigging trip to a local swamp will reunite the brothers.

After arriving at the marina, the brothers quickly become captives of a macabre family of cannibals. This family worships a legendary creature called the “Rougarou”- a monster with a human body and the head of a wolf. According to legend, this beast roams the swamps lurking in the shadows for his next victim.

Smart and sexy leader, Deputy Chaison is a conduit to the outside world. She brings the gruesome family a college student named Twila to be served up along with Billy and Kenny on the tribal fire pit. There is also a birthday celebration for a half-witted member of the group named Cortis, who licks his chops in anticipation of the horrific cuisine.

As the bizarre family prepares for the cannibalistic festivities, Billy, Kenny and Twila are able to escape into the swamp as they dodge a barrage of gunfire. Billy is severely wounded. It’s up to Kenny and Twila to avoid capture from a determined Deputy Chaison.

Kenny’s wife, Lorraine, is expecting their first baby any minute. She becomes frantic when she cannot reach either of the brothers on the phone. She and her mother-in-law, Martha, head out to the swamp in search of them.

After locating the marina, Lorraine and Martha become suspicious of this ghoulish family and they are quickly hog-tied by the intuitive Deputy Chaison. The stress causes Lorraine to go into labor and have the baby. In a nightmarish twist Deputy Chaison rips the baby from Lorraine’s arms.

Kenny and Twila are able to elude the macabre family’s search party and circle back to the marina. They discover Lorraine and Martha being readied for the large grill. Kenny and Twila concoct a plan to rescue Lorraine and Martha.

A swamp tribe called the Koroas, is led by Chief Kamakic who steals the newborn baby from Deputy Chaison and offers to sacrifice him to the “Rougarou.” Kenny and Twila strike. They save Lorraine and Martha from the fire pit and kill the other family member. Kenny saves the baby from Deputy Chaison. Twila kills a creature that only turns out to be a huge black bear and not the Rougarou.

The State Police arrive and conduct a search for Billy who has succumbed to his wounds. As Kenny, Lorraine, Martha and Twila leave in their van a loud howling emanates from the swamp.