1943: The newly formed Homicide division of the Victoria Police has been struggling to counter little-known fascist groups, particularly an organisation called Australia First that has been festering since before the war. And now there's an extra problem: the bitter divide between Catholics and Protestants, which is especially raw in small rural communities. Detective Joe Sable and Constable Helen Lord are working to track down the ruthless George Starling, who in turn is planning to wreak vengeance on them for the downfall of his nationalist group and mentor. At the same time, the duo is called to investigate a double murder in the fishing village of Port Fairy. The solution seems straightforward, but it soon becomes apparent that nothing about the incident is as it seems – and that investigations which appeared unrelated are tied by a disturbing thread.