Una avería en el radiador de su automóvil obliga a Bobby Cooper a parar en un remoto pueblo minero llamado Superior y a interrumpir así su viaje hacia Las Vegas. Allí, conoce a la misteriosa Grace y a su fornido marido Jack, quienes arrastrarán al forastero a un mortal juego de lujuria, locura y dinero.

Details the actions of New Orleans District Attorney Jim Garrison, who takes it upon himself to investigate the assassination of President John F. Kennedy in Dallas, Texas, in 1963. Garrison is extremely suspicious of the official story presented by the FBI, and what he already knows and what he subsequently learns lead him to suspect that there is more to the story than the public is being told.