In Darwin, Australia in the Northwest Territories, crocodiles aren't the only predators lurking about. Inspector Harry Chin, and his partner, Ash Friday, a fierce Aboriginal detective with dark brooding eyes, are sent from Canberra to investigate the murder of an Australian Federal Police Officer, Peter Riggs.

Riggs had been working undercover on an international heroin ring that seems to be coming in through the Port of Darwin. The officer had been found in his car dead from an overdose of heroin—the very drug that he had been investigating. Everything seems to be pointing to a heroin ring, but for Harry, something smells off. The scene reeks of staged tragedy, the victim's demise too tidy, too convenient. They soon find themselves knee-deep in their most perplexing case yet.

Harry and Ash, the AFP's most elite investigative team, dive into Darwin's underbelly; a labyrinth of sun-bleached docks and neon-drenched alleys. As they dissect alibis and peel back layers of deceit, they encounter a kaleidoscope of suspects: a Russian crocodile farm, an Asian gangster running a dive called the Buddha Bar, double-crossing kingpins, and a femme fatale with secrets as sharp as her stilettos. It soon becomes apparent that the crocodiles aren't the only dangerous souls around.