Medical examiner Sam Rivers and biologist Mary Callahan travel into the bayou to investigate the mysterious death of a fisherman. Having grown up in the area, Sam is comfortable in his surroundings while Mary is not. They find Elmer noodling for catfish in the swamp canals. With Elmer, Sam and Mary travel up river to the fishing community. They meet Gloria, the wife of the deceased fisherman. Gloria's daughter Eliza and her semi-boyfriend Dan also live in the house. Gloria explains that a boat washed up river a few months ago and strange things have happened since.