When investigative reporter Irwin "Fletch" Fletcher goes undercover to write a piece on the drug trade at a local beach, he's approached by wealthy businessman Alan Stanwyk, who offers him $50,000 to murder him. With sarcastic wit and a knack for disguises, Fletch sets out to uncover Stanwyk's story.

Fletch is a fish out of water in small-town Louisiana, where he's checking out a tumbledown mansion he's inherited. When a woman he flirts with turns up dead, he becomes a suspect and must find the killer and clear his name.