Werna Creek

At the end of the worst drought in Queensland's history, 80 kilometres west of Winton, three men have set up a camp on Cooinda, an 80,000-acre beef property, mustering cattle needed for a sale to satisfy a long-overdue loan.
A massive downpour leaves them isolated between two major waterways, where they find a severely injured man with no memory of who he is, or how he came to be there.
A news bulletin reveals who he might be; two police officers and their prisoner were washed off Werna Creek the previous day. The body of one of the constables is recovered but the other two men are still missing.
The search for the man's true identity is further complicated when he is convinced to leave the safety of Cooinda by two men who make an attempt on his life. With his memory slowly returning, the reason he's being hunted is eventually revealed.