Charles Bouvier was a psychopathic killer responsible for the abduction and disappearance of six teenage girls. In February 1983, he drowned in the Gulf of Mexico before he could be apprehended by an FBI task led by Gabriel Ross.

Fifteen months later Gabriel and his partner Ben O'Shea are in New Orleans setting up a new office and preparing to testify against a corrupt mayor and a local gangster.

Jessica Grant, the killer's only known survivor, comes out of hiding to warn police that Bouvier is alive and threatening her family. Her cries for help fall on deaf ears as the local police believe she is only seeking attention.

She turns to Gabriel Ross for help but finds out that he has disappeared. The Irish Bayou in Louisiana is the setting for a race against time to find Gabriel and stop the killer.