Pam White is a serial killer. In college, she and her two roommates form a covenant to avoid being implicated in a homicide that took place at a fraternity party. Twenty years later Pam is hanging precipitously near death from a ledge on a deserted mountain road. A car crash has taken place, and in the car are the charred remains of the husband of one of her old roommates. Despite a lack of evidence, Sheriff Sean Carmichael is convinced that these deaths were murders, and he begins a relentless, obsessive search for the truth. This psychological thriller, which sweeps from upstate New York to the Arizona desert to a Caribbean paradise, shows the degeneration of a woman's mind as she becomes an unharnessed psychotic killer.