When Hirsch heads up Bitter Wash Road in rural South Australia to investigate reports of gunfire, he finds himself cut off without back-up. A pair of thrill killers has been targeting isolated farmhouses on lonely backroads, but Hirsch’s first thought is maybe ‘back-up’ is nearby – and about to put a bullet in him. That’s because Hirsch is a whistleblower. Formerly a promising metropolitan officer, he has now been demoted and exiled to a one-cop station in South Australia’s wheatbelt. He is called a dog by his brother officers. Threats come through, in the form of a pistol cartridge in the mailbox. But the shots on Bitter Wash Road don’t tally with Hirsch’s assumptions. The truth turns out to be a lot more mundane. And the events that unfold subsequently are a hell of a lot more sinister.