After his girlfriend of 8 years dumps him, Ben (Joel David Moore) and a group of friends travel to New Orleans for Mardi Gras celebrations. While there, Ben decides to go on a haunted swamp tour, along with his friend Marcus (Deon Richmond). However, the pair discover that the tour has been canceled due to the tour guide being sued. However they find another tour guide, Shawn (Parry Shen), to take them. Unwillingly, Ben persuades Marcus to go on this tour. The pair meet the rest of the tourists, who include Marybeth (Tamara Feldman). Ben tries to become friends with Marybeth, but he rejects him. As the tour proceeds on the boat, the group get told of the ledgend of Victor Crowley. Distracted, Shawn crashes the boat into rocks, leading to the boat begining to sink. The group must climb along a tree to get to shore. As Ben encourages others, they all make it to shore, however Jim Permatteo (Richard Riehle) is bitten by an alligator. The group discover that Shawn is not a real tour guide but just a student trying to make money, and that Marybeth's brother and father went missing to, persumably, the hands of Victor Crowley. The group travel to a nearby house, however realize it is Victor Crowley's. Here, Ben witnesses both Jim and his wife, Shannon Permatteo (Patrika Darbo) brutally murdered by the diformed Crowley. While running, the group discover another body and decide to circle back to the house to get weapons. Ben and Marybeth go inside, but find her dead brother and father. As Ben confronts Marybeth, two more members of the tour are murdered, despite their efforts to fight off Crowley. Devising a plan to lure Crowley back to his house one more time and set fire to him, Ben enters the house to retrive gasoline tanks. Crowley appears and swiftly kills a group member. In the panic, Ben finds a tank and throws it on Victor while Marybeth and Marcus set him on fire, but it begins to rain and the fire is extinguished. The 3 remaining surviovurs (Ben, Marybeth and Marcus) race through a cemetery, where Crowley tackles Ben, spitting blood up over his face. Ben is saved however, but Marcus is quickly killed. As the two exit the cemetery, Crowley grabs a gate pole, and implaes Ben's foot with it. Marybeth bends the pole forward so it is pointing towards Crowley, who imaples himself upon it. After defeating Crowley, the pair get on a boat. However Marybeth is snagged by seaweed and falls into the water. She see's Bens hand sticking into the water for help. She grabs it and is pulled to the surface, only to see Crowley holding a dying Ben's severed forearm.