1917: The British campaign in Palestine is stalemated - the Turco-German army holds a formidable line from Gaza on the coast to Beersheba in the forbidding drylands between Sinai and the Dead Sea. In a final attempt to save the attacking British Army from disaster, everything depends on the 800 young Australian horsemen who obey the seemingly impossible order to gallop their horses across three miles of open desert into a hell of shell fire and machine gun crossfire. Smashing their way through Turkish defenses to win the precious wells of Beersheba, they change the history of the Middle East.