Near the rural town of Winton, Queensland, a truck driver hears a wild dog growling and finds the body of a teenage girl named Julie Mason inside one of the tunnels. Detective Jay Swan (Aaron Pedersen) is called from the city to investigate the murder. He learns that Julie was a drug addict and discovers she had sex with truck drivers for money. One night, Jay follows his colleagues, Johnno (Hugo Weaving) and Robbo (Robert Mammone), and sees them arrive at a run-down building in the middle of nowhere. When they spot him in the distance, he flees and they flag him down. Johnno asks him if he has ever killed anyone accidentally.