When an armoured aircraft containing millions crash lands in a post apocalyptic desert,A young and innocent hunter must travel down a dangerous road and battle against an assortment of motley, money hungry mercenaries in order to to be the first to the crash site to rescue her brother, before it becomes a deadly war zone.

Or you can abandon the post-apocalyptic idea. If you want to use some hi-tech gadgets and crazy weapons it can just be a little further in the future.

By the way, I suggested 'a highly precious cargo' so you can come up with something original in the script, something that fits with a post-apocalyptic world.

Paper money's value is contingent on the population's faith in the credit of the government issuing it. However, in a post-apocalyptic world, wouldn't all governments have collapsed? In which case paper money will be worthless.

However, gold always retains its mystique as a repository of wealth and medium of exchange.

Hey Huey.

Good re work by FFF but the stakes need clarifying.

Post apocalyptic implies that money would not really have the same value as pre apocalyptic so perhaps best to specify another commodity that would could spark a war. Perhaps life saving water, food or oil (a bit close to Mad Max though?).

Perhaps:

After her brother crash lands a cargo plane full of water in a post-apocalyptic desert a young hunter must beat a tribe of mercenaries to the plane in order to save his life.

Hope this helps.