Summer on the Peninsula. The heat’s ramping up, the usual holiday madness building. D.I. Hal Challis is already recycling his shower water and starting to dread Christmas. But this year there’s something more. Women abducted and murdered on the Old Highway. A pall of fear over the scorched paddocks. The media are demanding answers - and Challis’s sleepy beat is set to explode.

Hirsh was a promising metropolitan officer - until he blew the whistle on a case of police corruption. Now he’s been exiled to a one-cop station in South Australia’s wheatbelt. Called a dog by his own cop brothers. So when he’s sent to investigate gunfire up isolated Bitter Wash Road he suspects his backup might be the one to put a bullet in him. He’s wrong. But the events that unfold turn out to be a lot more sinister.

Six Four. The nightmare no parent could endure. The case no detective could solve. The twist no listener could predict. For five days in January 1989, the parents of a seven-year-old Tokyo schoolgirl sat and listened to the demands of their daughter's kidnapper. They would never learn his identity. They would never see their daughter again. For the 14 years that followed, the Japanese public listened to the police's apologies. They would never forget the botched investigation that became known as Six Four.

An unidentified man is fished out of the sea with an anchor strapped to his waist. And for DI Hal Challis, this sparks the beginning of a chilling series of shotgun killings. As Challis investigates, a farmer on the peninsula erupts into violence and is the target of a massive manhunt. And then Challis finds some aerial photographs in the possession of his friend Kitty that link her to the murders....

The neat suburban homes of the Peninsula seem like an improbable setting for sex parties, blackmail and murder. But when DI Hal Challis is called to investigate the murder of Janine McQuarrie - shot in a deserted country lane in front of her seven-year-old daughter - his progress is hampered by a web of lies and secrets. Everybody has something to hide, something to lose. And someone in Waterloo is determined to kill again.