When Jack Edney is assaulted and hospitalized in Priouxville on the banks of Ghost Bayou near Bayou Teche in Louisiana, Tony Boudreaux forgoes his long anticipated vacation to aid his best
friend. The assailants were searching for hidden diamonds, but the jewels turn out to be the least of his worries when Tony stumbles onto three murders the locals attributed to the mythical
loup garou, a shape-changing creature roaming the swamps.