John Wintergreen, a motorcycle cop in Arizona, aspires to become a detective. His dream seems within reach when he is called to investigate the death of an old hermit in the desert, initially believed to be a suicide. John, along with his partner Zipper, meticulously gathers clues that suggest foul play, gradually leading the case to be reclassified as a homicide. Throughout his investigation, John attempts to prove his worth to the cynical and world-weary Detective Harve Poole, who is supervising the case. John's enthusiasm and acute observations begin to shed light on a darker, underlying conspiracy.

As John navigates through the complexities of the case, he faces challenges both from within the police department and from the unpredictable elements of the desert environment. His idealism is constantly tested by the harsh realities of his job and the moral compromises of those around him. Interpersonal conflicts, bureaucratic obstacles, and ethical dilemmas further complicate his path. While pursuing the truth, John is forced to confront the gritty and corrupt aspects of law enforcement, causing him to question his own values and ambitions. His journey is a stark portrayal of the struggle between integrity and disillusionment in the pursuit of justice.