Detective Napoleon Bonaparte assumes the identity of a horse thief to infiltrate a criminal network and solve the murder of a government official. Bonaparte, a half-aboriginal investigator known for his keen observational skills and deep connection to the Australian landscape, must navigate the dangerous social dynamics of the outback. He faces opposition from hardened criminals and the inherent suspicion of those he investigates while operating under a false persona. The narrative follows a traditional procedural structure, emphasizing the protagonist's methodical approach to gathering evidence in a remote, unforgiving environment.

Arthur W. Upfield's work is often noted for its unique integration of Australian geography and indigenous cultural elements into the classic detective procedural. The character of Napoleon Bonaparte remains a significant figure in the history of the genre, representing a distinct departure from the typical investigators of his era. Readers and critics frequently highlight the authenticity of the outback setting, which serves as more than just a backdrop but as an active participant in the narrative. The series is generally regarded for its atmospheric tension and the meticulous, often slow-burn approach to solving complex crimes.