In 1880s Australia, two notorious brothers, the Burns, are on the run after committing a heinous crime. When Charlie is caught, a determined officer offers him a chilling ultimatum: track down and kill his sadistic older brother Arthur to spare their youngest sibling from execution.

The Proposition
A notorious outlaw is coerced by a tough lawman into killing his older brother within a strict nine-day timeframe, with the threat of dire consequences for his younger sibling if the task is not completed.