Robinson (West Bentley), a school teacher, is a widower. His wife was the only witness to a crime commited by rich criminal Jimmy Dolan (Christian Slater) and he killed her to prevent her from testifying against him. Since then her voice haunts Robinson but he's unable to take revenge on someone as high flying as Dolan. Years pass and finally Robinson makes a plot when he finds out that Dolan travels regularly through the desert road in his silver Cadillac.